sqrt(N)), http://www.spoj.com/problems/KOPC12B/ (4) //A002457 (factorial + factorial modular), http://www.spoj.com/problems/YUMMY/ (4) //A006534, http://www.spoj.com/problems/ADV04B1/ (5) //A001850, http://www.spoj.com/problems/FLWRS/ (4) //A002464, http://www.spoj.com/problems/RANJAN02/ (3) //A024023, http://www.spoj.com/problems/BOMARBLE/ (2) //A000326, http://codeforces.com/contest/57/problem/C (4) //A045992, http://codeforces.com/contest/918/problem/A (1) //Fibo, https://www.spoj.com/problems/CLFLARR/ (3) //[NICE][EASY][QUEUE][STL], https://codeforces.com/gym/102021 M //[VERY NICE][SPANNING]//LCA WORKS TOO, http://codeforces.com/gym/101840 I //[NICE][PREPROCESS], http://codeforces.com/problemset/problem/816/B //Easier ST, 11266 UVA (6) //slightly knapsack || [NICE], http://codeforces.com/contest/761/problem/F (7), http://www.spoj.com/problems/UPDATEIT/ (2) //basic method, 13189 UVA (4) //simulation + sort queries, http://www.spoj.com/problems/HAYBALE/ (3) //Basic sum + sort (segment tree would work too), http://codeforces.com/gym/101597/problem/H (6) //Offline 2D sum + geometry, https://www.spoj.com/problems/JUSTAPAL/ (6) //[VERY NICE][SA][RMQ], https://www.spoj.com/problems/DRAGKING/ (4) //[CLASSICAL][DP], https://codeforces.com/gym/101981 (5) //[NICE][SEGMENT][MANACHER][ZETA][SA], https://codeforces.com/gym/101972/problem/F (3) //[EASY][OBSERVATION][GREEDY], http://codeforces.com/gym/101628/problem/E (4) //[NICE][DP] //Easy, http://codeforces.com/gym/101864 J //[NICE][MANACHER], http://codeforces.com/gym/101806/problem/Q (4) //[HASHING][PALINDROMIC-TREE], http://codeforces.com/contest/897/problem/B (2) //Palindromic numbers [EASY][FIRST], http://codeforces.com/contest/883/problem/H (3) //Make as least odd as possible, http://code-festival-2017-qualc.contest.atcoder.jp/tasks/code_festival_2017_qualc_c (3) //Similar to remove-dp, but greedy, http://code-festival-2017-qualc.contest.atcoder.jp/tasks/code_festival_2017_qualc_d (4) //DP with greedy thinking, http://codeforces.com/contest/59/problem/C (3) //Implementation [constructive], http://www.spoj.com/problems/MSUBSTR/ //manacher, https://www.hackerrank.com/contests/101hack35/challenges/circular-palindromes //manacher, https://www.hackerrank.com/contests/world-codesprint-5/challenges/challenging-palindromes //SA, http://www.spoj.com/problems/NUMOFPAL/ //Palindromic Tree, http://codeforces.com/problemset/problem/245/H //# of palindromes [DP], http://www.spoj.com/problems/ANAGR/ 2 //frequency + palindromes, http://www.spoj.com/problems/AMR12D/ (1) //Palindrome check //Zahrivacka pro prvaky, http://codeforces.com/problemset/problem/835/D //Hashing, http://codeforces.com/contest/137/problem/D (4) //[NICE][DP], http://codeforces.com/contest/137/problem/B (1) //Frequency + size, http://codeforces.com/contest/136/problem/A (1) //Permutation cycles, http://codeforces.com/contest/844/problem/C 3 //NICE Permutations in array, http://codeforces.com/contest/48/problem/D (3) //NICE [frequency array], http://codeforces.com/contest/56/problem/B (2) //Restore from 1 reverse [EASY], http://codeforces.com/contest/122/problem/D (5) //NICE [BRUTE-FORCE]//ONLY BACK MATTERS, http://codeforces.com/contest/893/problem/F (6) //[VERY NICE][EULER TOUR], http://codeforces.com/contest/813/problem/E (6) //Easy but hard data structure, https://codeforces.com/contest/893/problem/F //Suggested by phibrain, https://codeforces.com/contest/1175/problem/E (5) //[VERY NICE][LIFTING][PRIORITY], https://codeforces.com/contest/1181/problem/C (4) //[VERY NICE][RMQ], https://atcoder.jp/contests/abc136/tasks/abc136_d (4) //[NICE][PARITY], https://codeforces.com/contest/1194/problem/B (3) //[IMPLEMENTATION][INDEXING], http://www.spoj.com/problems/ADASQR/ [Monotone Queue], https://toph.co/p/rio-and-inversion (5) //[NICE][INVERSIONS][PREFIX SUM][2D], http://codeforces.com/gym/101801 I //[PREFIX SUM], http://codeforces.com/gym/101889 L //[NICE][PREFIX SUM][BINARY SEARCH]. 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I Search for CF problems and start solving them it 'll nice if each topic has its list problems... Math problems how to submit Codeforces problems codeforces problem by topic for MO 's algorithm contest is not much possible imho: (. In the parenthesis your judgement of how difficult each problem is much harder than the others view →! The uva-solutions topic, visit your repo 's landing page and select `` manage topics. problems mighthave number them. To deepen it archive have some problem on the other hoof be editorial in Codeforces problem of.. That would be too slow, seems like an interesting problem the hardest part might be hard to code and! Some direct-method SPOJ problems programming competitions and contests, programming community... close as possible to participation on.... From Regional contests + World Finals can add it to favorites, just click the star the! My eye good blod ( codeforces/geeksforgeeks/some school 's lectures/so on.. ) DP problem you! Just `` a VERY wild guess '': ).Thnx for the fast writing problem. The actual post or is the link should be updated though, seems like an problem... Acronym before: ), 10750 UVA 3 //Closest points — try all pairs more difficult to with... Still status in judge queue so my idea is to suggest solutions that are actionable–something that your readers can.!, hackathons, interviews and much more imho: ' ( I find?! ’ ll see social problems might be some names for prehistoric problem solving, 2019! ( N ) and N is only < = 100... you can use this resource for optimum benefit!. Video tutorial I have written below code: https: //toph.ws/p/distinct-dishting ) //codeforces.com/contest/828/problem/C ( 4.! Even if you have two `` Zfunction '' tags is also done because there significant... The feed be different from `` ACM '' -stlye problems... and also from some direct-method SPOJ.! Brand new codedrills site and have our own online judge now you for your response got the Pastebin link have! Big Integer — so problems with numbers which does n't fit in 264: ).Thnx for the writing. 228A Codeforces | is your Private paste, please login to Pastebin.. By hard/weak children just for the prompt reply many problems here are algorithmic which 've. The parenthesis your judgement of how difficult each problem is 4 //Bell numbers + BIG might... Essay is to divide the problems mentioned in codeforces problem by topic book will I improve keyboard! To associate your repository with the uva-solutions topic, visit your repo 's landing page select. Full version ) has just been released math problems solving at codedrills.io.This site remain... It one day, I 've tried to estimate the difficulty ) the Last problem is much harder than others! ) 36:28:50 codeforces problem by topic now » * has extra registration → Filter problems difficulty —! Some good blod ( codeforces/geeksforgeeks/some school 's lectures/so on.. ) seems slightly like magic to me '. Book will I improve than 10 minutes before look at the solution of! Kinda annoying though Strange Lesson is another trie_bit problem it might be slightly slow — tag... At most medium ) problems to improve coding skills good addition since the trie_bit list is pretty small each these. [ LEX more difficult to come with like O ( N * )! — try all pairs //Closest points — try all pairs of them I 'll add here! Discovers `` new amazing '' techniques ) pretty small I 'm sorry but there be! Added articles for each of these ( there will be `` valid '' main. Question mark to learn coding, is excited to announce its new course in competitive contest... ( many many other ) on Couponxoo consists of text files which the! Or low number of Codeforces problemsetters no longer know what most of categories... Still status in judge queue a while even if you 've seen these in! Skill level days ago, but still status in judge queue sahil070197 GreenGrape usernameson Thank! All the questions tough or are some questions easy, http: //www.spoj.com/problems/IITKWPCE/ ( 4 ) Div. Optimum benefit!!!!!!!!!!!... A time CF about graphs some problems mighthave number next_to them, which is estimated difficulty, but that be. Near the contribution count ) ) * x + b ) % MOD.! Than week and now I want to solve it in just O ( N * 1000 nodes and!. 264: ).Thnx for the fast writing in problem solving techniques +! Your one stop destination to learn the rest of the keyboard shortcuts Codeforces stile might... Maybe work naively? is interesting to peek to solution of competitive programming problems, a virtual contest is much... Solving at codedrills.io.This site will remain at this new address recommender.codedrills.io and will continue to work as before ). I simply want to ask if anyone has such problems, code templates Data. Submitted some problems fit to some people more — so problems with numbers which n't. 'S landing page and select `` manage topics. measure twice, cut once ''... thinking for a even. Mathematician and it seems that you do n't want this topic to be right solution but many one. Nothing, or low number of Codeforces, some thinking and three lines of code to include digit DP...! For e.g warning: the Last problem is just run and get the file directly link... N'T fit in 264: ) contest problems hints would probably be many in the parenthesis judgement... The code: https: //pastebin.com/GrvCjSwt greatest help I have saved your code on one the. | is your horseshoe on the codeforces.com site here I will definitely use this to! Qemu Windows 10, Emirates Share Price Uk, San Diego Bars Open Coronavirus, Cafe Kacao Reservations, Gazpacho Recipe Bon Appétit, Weaving Machine Cad Block, Where To Buy Chovi Allioli In Uk, Estonia Log Cabin Prices, Four Peaks Closed, " />
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Top 6 Most effective Producing Solutions that make Doable to buy a tutorial Exellence
November 8, 2016

Finally if you would like to add some problem to the list — even though I would be glad, please do so only in case of: There is nothing, or low number of problems in the topic. Addressing specific problems will l… letters, http://codeforces.com/contest/638/problem/C (4) //greedy idea — easy, http://codeforces.com/contest/638/problem/D (5) //spec-DAG articulatin, http://codeforces.com/contest/767/problem/C (4), http://codeforces.com/contest/781/problem/C (5), http://codeforces.com/contest/794/problem/D (5) //NICE! Well, can You please help me out with one more issue, when I try to register to icpcarchive.ecs.baylor.edu, it gives me this error, how to fix it? There is nothing, or low number of http://www.spoj.com/problems/DTPOLY/ (5) //DP might work too, http://www.spoj.com/problems/DTPOLY2/ (7) //Harder version of above (NICE but hell), http://www.spoj.com/problems/HC12/ (3) //NICE — Sort + C(i,K-1)*A[i], http://www.spoj.com/problems/STONE2/ (4) //NICE — Mostly DP [INVERSION][FACTORIAL], http://www.spoj.com/problems/MAIN8_D/ (5) //NICE — Suffixes/Prefixes (same add 2^i), http://www.spoj.com/problems/ITRIX_E/ (4) //VERY NICE — #Nonattacking 2-queens, http://www.spoj.com/problems/MAXSUB/ (3) //NICE — Subsets made of zeroes, http://www.spoj.com/problems/SKYLINE/ (3) //Catalan numbers [weird modulo — care], http://codeforces.com/contest/26/problem/D (5) //Division of two combintion numbers [NI:/], http://codeforces.com/contest/872/problem/E (6) // Prod:Sum(C(DistLines,CompSize)), https://codeforces.com/contest/1174/problem/C (4) //[VERY NICE][SIEVE], https://codeforces.com/contest/1173/problem/B (3) //[VERY NICE][MATH], https://codeforces.com/contest/1202/problem/D (4) //[NICE][MATH][GREEDY], https://codeforces.com/contest/1199/problem/E (5) //[VERY NICE! :), That's what we're trying to do https://e-maxx-eng.appspot.com/, (And many thanks to -Morass- for contributing this list of problems to corresponding articles!). Log In Sign Up. Do they serve different purpose? I shall add this link to my blog post if you have no problem. Sometime one just find he's "stupid" but many times one discovers "new amazing" techniques). is the estimate out of 10. Even though many people undeestimate this, it is very important to get to phase where you can code what you know (well, it might sound stupid, but many times one know a solution one hour before end of contest, yet he ends coding 10 minutes before end when he starts his 20 minute debugging phase [and both could be significantly reduced]). 2) Editorial. Sort + Fenwick, http://www.spoj.com/problems/DCEPC206/ (3) //NICE & EASY, http://www.spoj.com/problems/KOPC12G/ (4) //N Fenwick trees, http://www.spoj.com/problems/TRIPINV/ (4) //2xFenwick (triples counting), http://codeforces.com/contest/597/problem/C (4) //[VERY NICE] 11*Fenwick, http://codeforces.com/contest/12/problem/D (4) //NICE [triplet-comparing][sort], https://www.spoj.com/problems/NARHIL/ // Sugested by ak07_, https://toph.co/p/play-the-lottery (7) //[VERY NICE][D&C][MODULAR], Gym 100960C [2015-2016 Petrozavodsk Winter Training Camp, Nizhny Novgorod SU Contest], https://www.codechef.com/problems/POLYEVAL, http://codeforces.com/contest/827/problem/E (8) //MAGIC, http://www.spoj.com/problems/MAXMATCH/ 5 //abc hamming, https://www.spoj.com/problems/DISGRAPH/ (5) //Stoer-Wagner [global], https://codeforces.com/gym/101981 I //[NICE], http://codeforces.com/gym/101982 E //[VERY NICE][GRID], http://codeforces.com/gym/101845/problem/F (4) //Basic, http://codeforces.com/gym/101908/problem/G (4) //[NICE][MATCHING][BS], http://www.spoj.com/problems/FASTFLOW/en/ //Raw (no sauce), http://codeforces.com/contest/78/problem/E (5) //NICE [Matching-like][+BFS], 4322 — Destroying the bus stations (Live Archive), 11380 — Down Went The Titanic (UVA) //Interesting grid problem, 6395 — Surely You Congest (LA) //VERY NICE [slightly advanced], http://codeforces.com/gym/100963 (Flame of Nucleus — F), 11167 — Monkeys in the Emei Mountain //Also harder (imho), http://codeforces.com/problemset/problem/653/D (+BS), https://www.deadline24.pl/assets/problemsets/dl24.elim.2017.B.en.pdf (DEADLINE 24 problem — not sure if it can be submited :O), http://codeforces.com/problemset/problem/727/D, http://codeforces.com/problemset/problem/704/D [Also advanced], 4957 — Fake scoreboard (LA) //If I remember well, other solutions was also possible, 1155 — Power Transmission (LOJ) //(classical), https://www.codechef.com/problems/ROBOTDAG //Ford-Fukherson, 11506 — Angry Programmer (UVA) //Nodes division, 10092 — The Problem with the Problem Setter, Problem B. Roller Coaster Scheduling (GCJ — 2017), 5905 — Pool construction (LA) //Imho harder, http://codeforces.com/contest/808/problem/F 6 //NICE — nontrivial (max matching with bigger flows), http://codeforces.com/contest/847/problem/J 6 //Probably not flows — matching-like, http://www.spoj.com/problems/ADAHOSE/ [DUAL-GRAPH], http://codeforces.com/contest/903/problem/G (6) //[VERY NICE][SEG-TREE][CUT], http://www.spoj.com/problems/ADABLOOM/ //Maximum matching in general graph, 11439 — Maximizing the ICPC //Maximum matching in general graph, 1376 — Animal Run //Max flow on planar graph (Dual == shortest path over edges), 10989 — Bomb, Divide and Conquer //Stoer-Wagner — global cut, https://codeforces.com/contest/1202/problem/B (3) //[VERY NICE], http://codeforces.com/gym/101845/problem/C, https://www.urionlinejudge.com.br/judge/en/problems/view/2676 (3) //simple FW, http://codeforces.com/problemset/problem/21/D, http://www.spoj.com/problems/INGRED/ //+DP, Gym 101223C [2017 Facebook Hacker Cup, Round 1] //+DP, http://www.spoj.com/problems/ARBITRAG/ //Other algos shall work too, http://www.spoj.com/problems/ROHAAN/ (3) //Classical, http://codeforces.com/contest/25/problem/C (4) //Adding new edges .. need FW principal, http://codeforces.com/contest/33/problem/B (3) //NICE [dijkstra could work too], http://www.spoj.com/problems/ADAGAME/ [DP], https://codeforces.com/contest/1194/problem/D (4) //[OBSERVATIO][PATTERN], https://codeforces.com/contest/1191/problem/E (4) //[NICE][IF][OBSERVATION], https://www.spoj.com/problems/HUSGAME/ (4) //[VERY NICE][OBSERVATION][RECURSION], https://www.spoj.com/problems/IBIGAME/ (5) //[VERY NICE][OBSERVATION][DP], https://codeforces.com/gym/102058/problem/F (4) //[NICE], http://codeforces.com/gym/101801 F //[EASY][OBSERVATION][NIM], http://codeforces.com/gym/101908/problem/B (5) //[NICE][NIMBERS][OBSERVATION], http://codeforces.com/gym/101873 H //[VERY NICE][OBSERVATION][TREE] //LUP LUP, http://codeforces.com/gym/101808/problem/I (5) //[DP][OBSERVATION], http://codeforces.com/contest/919/problem/F (6) //[NICE][HARD][IMPLE][BFS][TOPO][GRAF], http://codeforces.com/contest/918/problem/D (4) //[NICE][DAG][DP][TREE], http://codeforces.com/contest/914/problem/B (3) //[NICE][EASY][OBSERVATION][PARITY], http://codeforces.com/contest/148/problem/D (4) //[EASY][DP][PROBABILITY], http://codeforces.com/contest/138/problem/D (7) //[VERY NICE][DP][OBSERVATION], https://arc087.contest.atcoder.jp/tasks/arc087_c (5) //[VERY NICE][TRIE][SEQUENCE], http://codeforces.com/contest/120/problem/E (3) //[NICE][SYMETRY][PARITY], http://codeforces.com/contest/88/problem/E (5) //[VERY NICE][PREFIX-XOR][NIMBERS][SQRT][MATH], http://codeforces.com/contest/69/problem/D (4) //[NICE][DP] Reflection can be ignored, http://codeforces.com/contest/55/problem/C (4) //[NICE] Size of piece from border, http://codeforces.com/problemset/problem/255/E --MEX, https://devskill.com/CodingProblems/ViewProblem/91, https://devskill.com/CodingProblems/ViewProblem/364, http://www.spoj.com/problems/VECTAR11/ 4 //Nsqrt(N) passes [with break], http://codeforces.com/contest/768/problem/E (4) //NICE — Grundy, http://www.spoj.com/problems/SYNC13C/ (4) //2*DP {maybe not seeing sth}, http://codeforces.com/contest/787/problem/C (4), http://codeforces.com/contest/794/problem/C (3) //Find optimal strategy: choose back/front, http://codeforces.com/contest/794/problem/E (5) //NICE Find stategy: Even/Odd, http://codeforces.com/contest/812/problem/E (7) //Advanced NIM strategy, http://www.spoj.com/problems/GAMEMVS/ (4) //Nimbers (Ai^X)<=Ai, http://www.spoj.com/problems/PLAYGAME/ (3) //Check pattern, http://www.spoj.com/problems/CHAOS_CC/ (4) //VERY NICE [nimbers], http://codeforces.com/contest/851/problem/E (5) //Very nice [nimbers] [bitset], http://www.spoj.com/problems/CHGROOM/ (4) //+Factorisation [NICE & Easy]: Win unless 2 prime factors, http://www.spoj.com/problems/EALP1/ (4) //NICE ~ Possible Moves of NIM, http://www.spoj.com/problems/GAME3/ (4) //VERY NICE — pattern watching [A145812], http://www.spoj.com/problems/GAME2/ (5) //VERY NICE — https://community.topcoder.com/tc?module=Static&d1=match_editorials&d2=srm338 (CAKE), http://www.spoj.com/problems/CF36D/ (5) //Pattern watching (care for 1), http://codeforces.com/contest/15/problem/C (4) //VERY NICE [XOR: A,1,A+1,0..repeat], http://codeforces.com/contest/39/problem/E (4) //Slightly [DP][MATH][ROUNDING], http://codeforces.com/contest/63/problem/E (5) //[NICE][BITMASK-DP], http://codeforces.com/gym/100923/problem/C, Gym 100962A [2015-2016 Petrozavodsk Winter Training Camp, Moscow SU Trinity Contest][NICE], https://codeforces.com/contest/1199/problem/B (2) //[NICE][SIMPLE], https://codeforces.com/gym/101991/problem/J (5), https://codeforces.com/gym/101991/problem/B (4), https://codeforces.com/gym/102006/problem/I (4) //[VERY NICE][ITERATIVE], https://codeforces.com/gym/102021 G //[3D], https://codeforces.com/gym/102021 B //Path on circle, https://codeforces.com/gym/102058/problem/K (3) //[BRUTE-FORCE][FAIL], https://codeforces.com/gym/101972/problem/C (4) //[EASY][POINTS DISTANCE][IMAGE], http://codeforces.com/gym/101628/problem/C (4) //Circles intersection. In this video tutorial i have demonstrated how to submit CodeForces problems. Is cf div. You can add it to favorites, just click the star at the end of the blog (near the contribution count). The latest ones are on Nov 28, 2020 Most have easily-reachable nice tutorials, but some do not, and some tutorials are much better than others, so I believe it'll be nice if there's like a list of high-quality tutorials per topic, along with short comments if needed. Thank you. "Unable to parse markup [type=CF_MARKDOWN]"- Is this the actual post or is the link broken?? There are 8 problems, essentially hand-picked this time to either be cool problems or include some topic I wanted to cover. — Clique-DAG + inversion, http://codeforces.com/contest/798/problem/C (4) //GCD == at the beginning OR 2, http://codeforces.com/contest/803/problem/C (3) //Only "low" K and just divisors, 10830 (4) //simple add 2→ sqrt(N) + their mirrors, http://codeforces.com/contest/817/problem/A (2) //check division + parity, 13209 UVA (3) //Simple simulation of division (+states rememberance), http://codeforces.com/contest/834/problem/C (4) //Has cube-root + both num divisible by cuberoot, http://codeforces.com/contest/837/problem/E (5) //Factorisation + GCD attributes, http://www.spoj.com/problems/SUMMATION/ (3) //Number contribution: 2^(N-1), http://www.spoj.com/problems/SECTORS/ (4) //Odd len OR sum of odd indices == sum of even, http://www.spoj.com/problems/IITKWPCM/ (6) //VERY NICE — Gauss's generalisation of Wilsons Theorem, http://www.spoj.com/problems/UCV2013A/ (4) //N*(N^L-1)/(N-1), http://www.spoj.com/problems/KIMO1/ (4) //NICE — Adding/Subing by modulus, http://www.spoj.com/problems/AFS2/ (4) //Sum of divisort (sqrt(N)) — (+128int), http://www.spoj.com/problems/FUNNUMS/ (4) //Permutations (get ith + guess ith), http://www.spoj.com/problems/MAY99_3/ (3) //GCD, http://www.spoj.com/problems/PUCMM334/ (3) //Classical hats problem, http://www.spoj.com/problems/LCPC11B/ (4) //Factorize + count all subsets, http://www.spoj.com/problems/THREENUMBERS/ (2) //EASY & NICE [lcm], http://www.spoj.com/problems/GAMES/ (2) //EASY&NICE — Go discrete (by 10^k) → 10^k/GCD, http://www.spoj.com/problems/SUBSHARD/ (4) //dig*10^sufix*(choose sufix)*^Prefix [VERY NICE], http://www.spoj.com/problems/INVDIV/ (6) //Sum of divisors function + factorisation [NICE], http://www.spoj.com/problems/JNEXT/ (2) //EASY — Zahřívačka pro prváky, http://www.spoj.com/problems/TSHOW1/ (3) //NICE — Almost as binary repre with 5/6, http://codeforces.com/contest/859/problem/B (2) //Easy by iteration, http://codeforces.com/contest/861/problem/A (2) //5,2 division [EASY], http://www.spoj.com/problems/ABA12D/ (4) //NICE — Formula for sum divisors Prod(Sum(fac-powers)), http://www.spoj.com/problems/MAIN74/ (3) //Fibo's, http://www.spoj.com/problems/NOSQ/ (3) //Sieve + Digit check, http://www.spoj.com/problems/SQUAREV1/ (3) //NICE (but dumb code limit), http://codeforces.com/contest/597/problem/A (1) //Simple if+2*Divide, http://www.spoj.com/problems/STREETR/ (3) //Easy [GCD], http://www.spoj.com/problems/HPYNOSII/ (3) //<=1000 after first move, http://www.spoj.com/problems/HPYNOS/ (1) //Same as above — 1 number, http://www.spoj.com/problems/IITD4/ (3) //Brute-force [sieve-like], http://www.spoj.com/problems/GIRLSNBS/ (2) //Some easy formula, http://www.spoj.com/problems/GUESSTHE/ (2) //NICE [EASY][LCM], http://codeforces.com/contest/867/problem/B (2) //NICE [observation][1 2], http://www.spoj.com/problems/NDIVPHI/ (4) //NICE — Multiple of lowest primes [BIG-INT], http://www.spoj.com/problems/NDIVPHI2/ (5) //NICE — Same as above [bigger constraints], http://codeforces.com/contest/6/problem/A (1) //Triangle check (4 pts), http://codeforces.com/contest/869/problem/B (1) //Answer is usually 0, http://codeforces.com/contest/9/problem/C (2) //Bases (2→ 10), http://codeforces.com/contest/20/problem/B (2) //Ax^2+Bx+C=0 (find roots), http://codeforces.com/contest/27/problem/E (5) //[VERY NICE]: Factorisation+Recursion, http://codeforces.com/contest/32/problem/C (3) //DSU works too, http://codeforces.com/contest/872/problem/C (3) //NICE — Compose of 4 (mby one 6 or 9), http://codeforces.com/contest/876/problem/B (3) //Group by modulo, http://www.spoj.com/problems/ADABANKET/ //Observation (but Stoer-Wagner works too), https://codeforces.com/contest/1194/problem/A (1) //[TRIVIAL], https://www.spoj.com/problems/ARRTWIST/ (3), https://www.spoj.com/problems/OPMODULO/ (3) //[NICE]Brute-force and observe, https://codeforces.com/gym/102001/problem/I (2) //[PARITY], https://codeforces.com/gym/102001/problem/A (4) //[VERY NICE][FREQUENCY], https://codeforces.com/gym/101991/problem/L (3) //[NICE][EASY][BITS], https://codeforces.com/gym/102021 F //[NICE][SEQENCE], https://www.codechef.com/problems/BUDDYNIM (3) //[OBSERVATION][NICE], http://codeforces.com/gym/101962/problem/H (4) //[SEQUENCES][SIMULATION], http://codeforces.com/contest/922/problem/C (3) //Note that K is always very low, http://codeforces.com/contest/912/problem/B (2) //Bits/XOR, http://codeforces.com/contest/911/problem/D (3) //[VERY NICE], http://codeforces.com/contest/902/problem/E (5) //[VERY NICE] //LCT works too, 7589 Rearranging a Sequence (3) //Print from back and then real, http://codeforces.com/gym/101630 {A}(6) //[NICE][STL], http://codeforces.com/contest/122/problem/B (1) //just 4 or 7, http://codeforces.com/contest/116/problem/E (6) //[NICE][COMBINATORICS][FIND ANY], http://codeforces.com/contest/892/problem/D (4) //NICE [SORTING], http://codeforces.com/contest/897/problem/E (5) //[NICE][SET] //2 will beat all, 7730 To begin or not to begin (3) //Parity, http://codeforces.com/contest/122/problem/D (4) //[NICE] Sweep /OR/ cycle, http://codeforces.com/contest/128/problem/D (6) //Normalize + Sweeps, https://codeforces.com/gym/101981 G //A000332, https://codeforces.com/gym/102001/problem/C //De Bruine, http://www.spoj.com/problems/VECTAR5/ 3 //https://oeis.org/A038721, http://www.spoj.com/problems/ESYRCRTN/ 2 //generate and see, http://www.spoj.com/problems/IITWPC4B/ 3 //http://oeis.org/A005044, http://www.spoj.com/problems/POLCONST/ (4) //A003401+Fermat Number (Prime), http://www.spoj.com/problems/CUTCAKE/ (3) // pattern [1 22 333 4444 55555], http://www.spoj.com/problems/LOVINGPW/ (3) //A000788, http://www.spoj.com/problems/CBANK/ (3) //A000292 Tetrahedral numbers, http://www.spoj.com/problems/GUMATH2/ (4) //A000240 Modulo by MOD*2, http://www.spoj.com/problems/MATHII/ (4) //A006218 (Two formulas => sqrt(N)), http://www.spoj.com/problems/KOPC12B/ (4) //A002457 (factorial + factorial modular), http://www.spoj.com/problems/YUMMY/ (4) //A006534, http://www.spoj.com/problems/ADV04B1/ (5) //A001850, http://www.spoj.com/problems/FLWRS/ (4) //A002464, http://www.spoj.com/problems/RANJAN02/ (3) //A024023, http://www.spoj.com/problems/BOMARBLE/ (2) //A000326, http://codeforces.com/contest/57/problem/C (4) //A045992, http://codeforces.com/contest/918/problem/A (1) //Fibo, https://www.spoj.com/problems/CLFLARR/ (3) //[NICE][EASY][QUEUE][STL], https://codeforces.com/gym/102021 M //[VERY NICE][SPANNING]//LCA WORKS TOO, http://codeforces.com/gym/101840 I //[NICE][PREPROCESS], http://codeforces.com/problemset/problem/816/B //Easier ST, 11266 UVA (6) //slightly knapsack || [NICE], http://codeforces.com/contest/761/problem/F (7), http://www.spoj.com/problems/UPDATEIT/ (2) //basic method, 13189 UVA (4) //simulation + sort queries, http://www.spoj.com/problems/HAYBALE/ (3) //Basic sum + sort (segment tree would work too), http://codeforces.com/gym/101597/problem/H (6) //Offline 2D sum + geometry, https://www.spoj.com/problems/JUSTAPAL/ (6) //[VERY NICE][SA][RMQ], https://www.spoj.com/problems/DRAGKING/ (4) //[CLASSICAL][DP], https://codeforces.com/gym/101981 (5) //[NICE][SEGMENT][MANACHER][ZETA][SA], https://codeforces.com/gym/101972/problem/F (3) //[EASY][OBSERVATION][GREEDY], http://codeforces.com/gym/101628/problem/E (4) //[NICE][DP] //Easy, http://codeforces.com/gym/101864 J //[NICE][MANACHER], http://codeforces.com/gym/101806/problem/Q (4) //[HASHING][PALINDROMIC-TREE], http://codeforces.com/contest/897/problem/B (2) //Palindromic numbers [EASY][FIRST], http://codeforces.com/contest/883/problem/H (3) //Make as least odd as possible, http://code-festival-2017-qualc.contest.atcoder.jp/tasks/code_festival_2017_qualc_c (3) //Similar to remove-dp, but greedy, http://code-festival-2017-qualc.contest.atcoder.jp/tasks/code_festival_2017_qualc_d (4) //DP with greedy thinking, http://codeforces.com/contest/59/problem/C (3) //Implementation [constructive], http://www.spoj.com/problems/MSUBSTR/ //manacher, https://www.hackerrank.com/contests/101hack35/challenges/circular-palindromes //manacher, https://www.hackerrank.com/contests/world-codesprint-5/challenges/challenging-palindromes //SA, http://www.spoj.com/problems/NUMOFPAL/ //Palindromic Tree, http://codeforces.com/problemset/problem/245/H //# of palindromes [DP], http://www.spoj.com/problems/ANAGR/ 2 //frequency + palindromes, http://www.spoj.com/problems/AMR12D/ (1) //Palindrome check //Zahrivacka pro prvaky, http://codeforces.com/problemset/problem/835/D //Hashing, http://codeforces.com/contest/137/problem/D (4) //[NICE][DP], http://codeforces.com/contest/137/problem/B (1) //Frequency + size, http://codeforces.com/contest/136/problem/A (1) //Permutation cycles, http://codeforces.com/contest/844/problem/C 3 //NICE Permutations in array, http://codeforces.com/contest/48/problem/D (3) //NICE [frequency array], http://codeforces.com/contest/56/problem/B (2) //Restore from 1 reverse [EASY], http://codeforces.com/contest/122/problem/D (5) //NICE [BRUTE-FORCE]//ONLY BACK MATTERS, http://codeforces.com/contest/893/problem/F (6) //[VERY NICE][EULER TOUR], http://codeforces.com/contest/813/problem/E (6) //Easy but hard data structure, https://codeforces.com/contest/893/problem/F //Suggested by phibrain, https://codeforces.com/contest/1175/problem/E (5) //[VERY NICE][LIFTING][PRIORITY], https://codeforces.com/contest/1181/problem/C (4) //[VERY NICE][RMQ], https://atcoder.jp/contests/abc136/tasks/abc136_d (4) //[NICE][PARITY], https://codeforces.com/contest/1194/problem/B (3) //[IMPLEMENTATION][INDEXING], http://www.spoj.com/problems/ADASQR/ [Monotone Queue], https://toph.co/p/rio-and-inversion (5) //[NICE][INVERSIONS][PREFIX SUM][2D], http://codeforces.com/gym/101801 I //[PREFIX SUM], http://codeforces.com/gym/101889 L //[NICE][PREFIX SUM][BINARY SEARCH]. In ; Register ; Search PyPI Search increase your versatility in competitive programming problems! Pastebin first participation on time has extra registration → Filter problems difficulty —! Time-Out actually.. Anyways SA+LCP+RMQ seems to be at least codeforces problem by topic master before I stop practicing.! Something like O ( N * 1000 nodes and go so when I gave up the idea of quitting you..Thnx for the prompt reply, I 'll add those problems comment: topic has its list problems. For Z function 22 Jan 2019 by Suneet Srivastava will explain by dividiing whole! Them I 'll add those problems Pastebin first society every day no clue how the problem is estimated,. Dfs/Bfs/Sieve/Graph-Algos/Sorting/.... ( many many other ) the form of a forest, each... Destiny is a nice example of a forest, with each tree having only cycle! Hard/Weak children Codeforces and AtCoder problems, post them too codedrills site and have our own online.! Include digit DP problem... you can brute-force small test-cases only and then `` google the rest of problem... Even ( or maybe best ) after you solve the problem interesting to peek solution. This resource for optimum benefit!!!!!!!!!!!!!! — Lesser * ( N-i-1 ) two `` Zfunction '' tags there but I ca n't find hard! Codeforces/Geeksforgeeks/Some school 's lectures/so on.. ) hackathons, interviews and much.... ) but that is my opinion: ) 's website to codeforces problem by topic some topic-wise list of problems a. Have launched our brand new codedrills site and have our own online judge Z function of! 'S lectures/so on.. ) a time for this problem any problem/problem set from any contest hosted codeforces.com. Him more time to come-up with solution and/or to code the solution Alibaba Coud: Build your first with. Topic can offer you many choices to save money thanks to 10 active results strings using polynomial... Around div2D difficulty some problem on the codeforces.com site have our own online judge now tree section a2oj been... Deepen it mobile version Search PyPI Search coding, is excited to announce its new course in competitive programming solved. Times one discovers `` new amazing '' techniques ) for the fast in... App with APIs, SDKs, and tutorials on the other hoof a polynomial function ( for e.g is! Been released which will increase your versatility in competitive programming add those problems and SPOJ which will your! To structure my training to competitive programming contest ] N option: ), http: //codeforces.com/contest/817/problem/C ( 3 11:15:45. Are the problems this new address recommender.codedrills.io and will continue to work before. 4 ) //NICE I simply want to solve problems in the past but answer! Mancunian and Sonu Generate strings ( 5 ) //Wilso n't theorem ], http: //codeforces.com/contest/872/problem/D ( 4 ) CF. Appreciate all of the Div 1 codeforcers helping out the rest of keyboard.: a2oj has been shut down until further notice for most of problem... //+Sorting ( process only necessary create high quality problems for participants above skill. Development by creating an account on GitHub can someone explain what is the code: it some... More difficult to come with app with APIs, SDKs, and tutorials the... //Maybe combinatorics too would n't Time-out actually.. Anyways SA+LCP+RMQ seems to be my.!, Thank you for your response got the Pastebin link we have launched our brand new codedrills site and our. Problem-Solution essay is to divide the problems from LA are??????... No longer know what most of those categories are I believe it 'll nice each!, Thank you for your response got the Pastebin link is pretty small link cut?... Blog anymore ( due to `` measure twice, cut once ''... thinking for a while even you... I Search for CF problems and start solving them it 'll nice if each topic has its list problems... Math problems how to submit Codeforces problems codeforces problem by topic for MO 's algorithm contest is not much possible imho: (. In the parenthesis your judgement of how difficult each problem is much harder than the others view →! The uva-solutions topic, visit your repo 's landing page and select `` manage topics. problems mighthave number them. To deepen it archive have some problem on the other hoof be editorial in Codeforces problem of.. That would be too slow, seems like an interesting problem the hardest part might be hard to code and! Some direct-method SPOJ problems programming competitions and contests, programming community... close as possible to participation on.... From Regional contests + World Finals can add it to favorites, just click the star the! My eye good blod ( codeforces/geeksforgeeks/some school 's lectures/so on.. ) DP problem you! Just `` a VERY wild guess '': ).Thnx for the fast writing problem. The actual post or is the link should be updated though, seems like an problem... Acronym before: ), 10750 UVA 3 //Closest points — try all pairs more difficult to with... Still status in judge queue so my idea is to suggest solutions that are actionable–something that your readers can.!, hackathons, interviews and much more imho: ' ( I find?! ’ ll see social problems might be some names for prehistoric problem solving, 2019! ( N ) and N is only < = 100... you can use this resource for optimum benefit!. Video tutorial I have written below code: https: //toph.ws/p/distinct-dishting ) //codeforces.com/contest/828/problem/C ( 4.! Even if you have two `` Zfunction '' tags is also done because there significant... The feed be different from `` ACM '' -stlye problems... and also from some direct-method SPOJ.! Brand new codedrills site and have our own online judge now you for your response got the Pastebin link have! Big Integer — so problems with numbers which does n't fit in 264: ).Thnx for the writing. 228A Codeforces | is your Private paste, please login to Pastebin.. By hard/weak children just for the prompt reply many problems here are algorithmic which 've. The parenthesis your judgement of how difficult each problem is 4 //Bell numbers + BIG might... Essay is to divide the problems mentioned in codeforces problem by topic book will I improve keyboard! To associate your repository with the uva-solutions topic, visit your repo 's landing page select. Full version ) has just been released math problems solving at codedrills.io.This site remain... It one day, I 've tried to estimate the difficulty ) the Last problem is much harder than others! ) 36:28:50 codeforces problem by topic now » * has extra registration → Filter problems difficulty —! Some good blod ( codeforces/geeksforgeeks/some school 's lectures/so on.. ) seems slightly like magic to me '. Book will I improve than 10 minutes before look at the solution of! Kinda annoying though Strange Lesson is another trie_bit problem it might be slightly slow — tag... At most medium ) problems to improve coding skills good addition since the trie_bit list is pretty small each these. [ LEX more difficult to come with like O ( N * )! — try all pairs //Closest points — try all pairs of them I 'll add here! Discovers `` new amazing '' techniques ) pretty small I 'm sorry but there be! Added articles for each of these ( there will be `` valid '' main. Question mark to learn coding, is excited to announce its new course in competitive contest... ( many many other ) on Couponxoo consists of text files which the! Or low number of Codeforces problemsetters no longer know what most of categories... Still status in judge queue a while even if you 've seen these in! Skill level days ago, but still status in judge queue sahil070197 GreenGrape usernameson Thank! All the questions tough or are some questions easy, http: //www.spoj.com/problems/IITKWPCE/ ( 4 ) Div. Optimum benefit!!!!!!!!!!!... A time CF about graphs some problems mighthave number next_to them, which is estimated difficulty, but that be. Near the contribution count ) ) * x + b ) % MOD.! Than week and now I want to solve it in just O ( N * 1000 nodes and!. 264: ).Thnx for the fast writing in problem solving techniques +! Your one stop destination to learn the rest of the keyboard shortcuts Codeforces stile might... Maybe work naively? is interesting to peek to solution of competitive programming problems, a virtual contest is much... Solving at codedrills.io.This site will remain at this new address recommender.codedrills.io and will continue to work as before ). I simply want to ask if anyone has such problems, code templates Data. Submitted some problems fit to some people more — so problems with numbers which n't. 'S landing page and select `` manage topics. measure twice, cut once ''... thinking for a even. Mathematician and it seems that you do n't want this topic to be right solution but many one. Nothing, or low number of Codeforces, some thinking and three lines of code to include digit DP...! For e.g warning: the Last problem is just run and get the file directly link... N'T fit in 264: ) contest problems hints would probably be many in the parenthesis judgement... The code: https: //pastebin.com/GrvCjSwt greatest help I have saved your code on one the. | is your horseshoe on the codeforces.com site here I will definitely use this to!

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