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http://codeforces.com/contest/120/problem/D (3) //But maybe work naively ?! I may sound negative but there is no place for jerks like you who don't know how to praise good work and demotivate others from doing something. You Can sort the problems in decreasing order (The most solved first) Problemset - Codeforces nodes with list size of 1. This topic stands for Big Integer — so problems with numbers which doesn't fit in 264 :). Thanks for the A2A. http://codeforces.com/contest/890/problem/D (4) //[NICE][SET][SORTING][26][BRUTE-FORCE], http://codeforces.com/contest/43/problem/B (2) //Frequency, http://codeforces.com/contest/50/problem/B (2) //Frequency + Power, http://www.spoj.com/problems/MINMOVE/ (3) //Minimal lexicographical rotation, http://www.spoj.com/problems/BWHEELER/ //Burrows Wheeler, http://www.spoj.com/problems/EDIST/ //Edit Distance, https://www.hackerrank.com/contests/morgan-stanley-2015/challenges/minimum-transformation-cost/problem //Edit Distance, http://codeforces.com/gym/101492/problem/L //Laevenstein Distance, UVA 13068 //Lexicographically lowest rotation, 2755 [LA]//Lexicographically lowest rotation, LightOJ 1073 //Lexicographically Shortest Superstring, http://codeforces.com/contest/762/problem/C 5, http://www.spoj.com/problems/LCS0/ 10 //LCS, http://www.spoj.com/problems/IITWPC4H/ 2 //Frequence array, 13186 UVA (6) //Bitset + Trie ~ NICE [6-7 mby? Actually, I made it for my personal practice. ), https://www.spoj.com/problems/OVISLARSUM/ (3) //[FORMULA][128], https://www.urionlinejudge.com.br/judge/en/problems/view/2876 (6) //[VERY NICE][GCD][IE], https://codeforces.com/gym/102058/problem/E (3) //[BRUTE-FORCE][GCD], https://codeforces.com/gym/101972/problem/A (3) //[EASY][SIMULATION], https://www.codechef.com/viewsolution/21428053 (4) //[SORTING][ANGLES][MATH][COSINUS], http://codeforces.com/gym/101808/problem/G (4) //[GCD][IF][LCM], http://codeforces.com/gym/101666 L //[GREED][DP] Logarithms, http://codeforces.com/gym/101666 C //[NICE][GCD], http://codeforces.com/gym/101650 G //Graphs, http://codeforces.com/contest/934/problem/D (4) //Polynomials, http://codeforces.com/contest/919/problem/E (5) //[MODULAR-MATH], http://codeforces.com/contest/149/problem/B (3) //Base to 10, http://codeforces.com/contest/148/problem/A (2) //[EASY][SIEVE][BRUTE-FOCE][LCM][IE], http://www.spoj.com/problems/JGTLE/ (3) //Sum reduction, http://www.spoj.com/problems/BAPM/ (3) //Simple power / Observe, rare colisions, http://codeforces.com/contest/911/problem/C (2) //[Observation][Iff (or brute-froce)], http://codeforces.com/contest/133/problem/B (2) //Bases + implementation, http://codeforces.com/contest/129/problem/A (1) //Parity, http://codeforces.com/contest/124/problem/D (4), http://codeforces.com/contest/125/problem/A (1) //mod/div simple — if, http://codeforces.com/contest/902/problem/D (4) //Polynomials / Fibonacci / Bitset, http://codeforces.com/contest/899/problem/D (4) //X99999 possibilities, http://codeforces.com/contest/899/problem/C (3) //[NICE][GREEDY KNAPSACK], http://codeforces.com/contest/899/problem/A (1), http://codeforces.com/contest/898/problem/A (1), http://codeforces.com/gym/101620 {F}(4) //[IFS][INVERSE][CASES], http://codeforces.com/contest/900/problem/D (4) //[NICE][DIVISORS][GCD][IE], http://codeforces.com/contest/900/problem/B (2) //Cycles or Brute-force + Division, http://codeforces.com/contest/119/problem/A (2) //[EASY][GCD], 8014 — Birthday Pizza Party (4) //[NICE][OVERFLOW][LCM WITH SHIFT], 7629 — Powers (3) //One path is factorisation, 8037 — Military Service (2) //Sample formula, 8085 — Divisors (4) //[NICE][PRIMES/FACTORISATION/SIEVE], 6589 — Captain Obvious and the Rabbit-Man (7) //Sylvester's formula, 6582 — Magical GCD (4) //[NICE] — Data structures works too, https://devskill.com/CodingProblems/ViewProblem/421 (2) //6 buckets, http://codeforces.com/contest/93/problem/E (5) //[VERY NICE][DP][RECURSION], http://codeforces.com/contest/86/problem/A (3) //[NICE] 50* is best (unless more digits), http://codeforces.com/contest/83/problem/D (5) //[VERY NICE][PRIMES][BRUTE-FORE-2], http://codeforces.com/contest/82/problem/A (2) //Simulation, http://codeforces.com/contest/74/problem/C (4) //gcd, http://codeforces.com/contest/76/problem/E (4) //Divide sumations [BF], http://codeforces.com/contest/71/problem/C (3) //[EASY][NICE][BRUTE-FORCE][DIVISORS], http://codeforces.com/contest/70/problem/A (2) //3^(N-1), http://codeforces.com/contest/43/problem/C (2) //Moduly by 3 {0/2+min(1,2)}, http://codeforces.com/contest/50/problem/A (1) //[EASY], http://codeforces.com/contest/61/problem/C (4) //Base conversion + roman, https://www.codechef.com/problems/COPRIME3 //Cyka Möbius, http://www.spoj.com/problems/PSTR/ //Cyka Möbius, http://codeforces.com/problemset/problem/803/F //Cyka Möbius, https://devskill.com/CodingProblems/ViewProblem/23, http://codeforces.com/contest/731/problem/F 4, http://codeforces.com/contest/722/problem/F (8), http://codeforces.com/contest/716/problem/C 4, http://codeforces.com/contest/711/problem/E (8), http://codeforces.com/contest/710/problem/D (6), http://codeforces.com/contest/757/problem/E (8), http://codeforces.com/contest/758/problem/F (7), 11237 UVA (4) //Nice — seems like knapsbag but it it not, 11155 UVA (4) //Almost as previous problem, 11038 UVA (3) //counting digits on interval, http://codeforces.com/contest/763/problem/C (7), 11087 UVA (4) //Sums of two numbers divisible with <=500 (10^5), http://codeforces.com/contest/678/problem/C 2 //LCM, http://codeforces.com/problemset/problem/665/F (8) //p^3 | p*q, http://www.spoj.com/problems/LCMSUM/ //Vzorec v knihovničce, http://www.spoj.com/problems/FRNDZND/ (2) // (size 1 == 1, else 0), http://www.spoj.com/problems/EXPOR/ //bit-by-bit (+ formula), http://www.spoj.com/problems/FACTDIV/ (5) //dyn-update of ans/factors GOOD, http://www.spoj.com/problems/PAIRDIV/ (6) //cyka möbius -_-, http://www.spoj.com/problems/FCDC/ (4) //keep factorized factorial. By Ahnaf.Shahriar.Asif, history, 18 months ago, Today I've listed some DP tutorials and problems. Hey -Morass- I've been trying to solve SPOJ — JUSTAPAL from the palindrome category using hashing + binsearch and then using nlogn SA + LCP + RMQ to get first and second mismatches and do some swaps. On a separate note, I believe it'll nice if each topic has its list of tutorials too. But I think It may … You Can sort the problems in decreasing order (The most solved first) Problemset - Codeforces 2, B Description: List of random Codeforces problems, all of them are Div. Ladder Name: 5 - Codeforces Div. imho there shall be easy questions too. Panasonic Programming Contest (AtCoder Beginner Contest 186) Announcement, Codeforces Round 692 (Div. Is there something to take into account for getting a faster solution. Before contest Codeforces Round #680 (Div. If this is your private paste, please login to Pastebin first. Revision en15, by Ahnaf.Shahriar.Asif, 2019-07-24 08:51:17 Today I've listed some DP tutorials and problems. Before stream 09:43:26. *has extra registration Thanks! NICE & EASY, http://codeforces.com/contest/817/problem/C (3) //Check S+Constant (NICE! Sometime one just find he's "stupid" but many times one discovers "new amazing" techniques). 840D - Destiny is a nice example of a tricky wavelet tree. 11:11. Codeforces Problemset Solutions All of the problems are under copyright of Codeforces.com. Home; Top; Contests; Gym; Problemset; Groups; Rating; Edu; API; Calendar; Help; 10 years! Auto comment: topic has been updated by -Morass- (previous revision, new revision, compare). https://codeforces.com/problemset/problem/1096/G, https://codeforces.com/problemset/problem/632/E, https://codeforces.com/problemset/problem/1251/F. (in category 'topo', problem : spoj — 'CODESPTI'), well it was just kind of hint that in my approach you should distinguish nodes by their "shape" (which recursively applies). [not sure if grd poss. As a learner, you can improve your programming skills by participating in contests with varying levels of difficulty. Thank you so much! In your MO part there is a problem(https://toph.ws/p/distinct-dishting). I appreciate all of the div 1 codeforcers helping out the rest of us! More features: - Show each phase and compare it with previous one. Enter | Register . All the files above have their own problem number. Before contest Codeforces Round #683 (Div. PS: I'm sorry but there might be some duplicities. Even though I couldn't involve all problems, I've tried to involve at least "few" problems at each topic I thought up (I'm sorry if I forgot about something "easy"). Add this to geometry: https://icpc.kattis.com/problems/airport Really nice problem :), Aho-Corasick: http://codeforces.com/problemset/problem/346/B. However I'm still getting TLE. Sort users by rating and last participation date. Problems can be filtered by tags. 11:11. DP Tutorial and Problem List. sorry but not :'( Maybe there is something in Number Theory but I wouln't bet on many problems, Some more easy problems on Josephus : http://www.spoj.com/problems/WTK/ (Easy) http://www.spoj.com/problems/DANGER/ (Easy) http://www.spoj.com/problems/POCRI/ (Medium) http://www.spoj.com/problems/NG0FRCTN/ (Medium), thank you very much. It'll help me too. But I think It may Help others too. Programming competitions and contests, programming community. (26), http://codeforces.com/contest/767/problem/E (6), http://codeforces.com/contest/637/problem/B (3) //NICE pro prvaky, http://codeforces.com/contest/777/problem/B (3) // -||-, http://codeforces.com/contest/777/problem/D (3) //just go from end, http://codeforces.com/contest/779/problem/C (3) //NICE pro prváky, http://www.spoj.com/problems/SPCU/ (2) //Easy — zamysleni (max int = index), http://www.spoj.com/problems/LOPOV/ (4) //sort + queue (or just queue) NICE, http://codeforces.com/contest/792/problem/E (5) //T%S<=T/S + check proper, http://codeforces.com/contest/807/problem/E (5) //NICE — put asice P2 / rest — greedy from small, http://codeforces.com/contest/799/problem/E (5) //Many queues — but NICE, http://codeforces.com/contest/808/problem/C (3) //EASY, http://codeforces.com/contest/802/problem/B (4) //Priority by "next", http://codeforces.com/contest/813/problem/A (1) //Zahrivacka pro prvaky, 10716 UVA (4) //NICE — always find closest pair, http://codeforces.com/contest/816/problem/C (3) //NICE — greater=K b) (SEG_SIZE-1)/K+1, http://www.spoj.com/problems/BUSYMAN/ (2) //NICE&EASY — Sort + keep minimum, http://codeforces.com/contest/861/problem/C (3) //2+ but not same, http://www.spoj.com/problems/WORKB/ (3) //Simple "min" formula for each neighbor, http://codeforces.com/contest/864/problem/D (4) //VERY NICE — Frequency + unused, http://www.spoj.com/problems/ROADTRIP/ (4) //VERY NICE — Keeping last lesser, http://codeforces.com/contest/597/problem/B (3) //NICE [Classical], http://www.spoj.com/problems/SHLIGHTS/ (4), http://www.spoj.com/problems/MLK/ (3) //VERY NICE — Sum all prefix sums, http://codeforces.com/contest/867/problem/C (4) //NICE [IMPLE][2POINTERS][MID+EPS], http://codeforces.com/contest/867/problem/E (5) //NICE [EASY-IMPLE][HARD-CONS], http://codeforces.com/contest/18/problem/D (4) //+Big Integer, http://codeforces.com/contest/276/problem/D (4) //NICE — Find first mismatch bit (then 111...111), http://codeforces.com/contest/3/problem/B (4) //Divide 1/2 [sort][2pointers], http://codeforces.com/contest/3/problem/D (4) //?==) ..if open < 0: set max A-B to (, http://codeforces.com/contest/26/problem/B (4) // +1 ( | -1 ): -1, erase .. erase sum in the end, http://codeforces.com/contest/33/problem/A (2) //EASY [long-statement], http://codeforces.com/contest/44/problem/E (2) //Try mins then try maxs, http://codeforces.com/contest/45/problem/D (3) //Priority-queue+'sort', https://codeforces.com/contest/1200/problem/E (5) //[VERY NICE], http://codeforces.com/gym/101808/problem/B (5) //[NICE][NUMBERS], http://codeforces.com/gym/101741/problem/K (5) //[NICE][SQRT][PATTERN MATCHING], 7979 — Red Rover (3) //[NICE] //Many other ways to solve, http://codeforces.com/contest/898/problem/F (5) //[VERY NICE]//Hash by 10, http://codeforces.com/contest/114/problem/D (4) //[NICE] //N^2Log(N) might/might-not be OK, https://www.urionlinejudge.com.br/judge/en/problems/view/1503 (7) //[NICE][BS][OPTI], Gym 101466E [2017 ACM-ICPC, Universidad Nacional de Colombia Programming Contest][NICE], http://codeforces.com/contest/727/problem/E 7, http://codeforces.com/contest/718/problem/D 8, http://codeforces.com/contest/752/problem/D 5, http://codeforces.com/contest/825/problem/F 5 //String + Periods, http://codeforces.com/contest/835/problem/D 4 //Palindromes, http://www.spoj.com/problems/CF25E/ (5) //VERY NICE [IMPLE>CONCEPT], http://codeforces.com/contest/7/problem/D (4) //Palindromes, http://codeforces.com/contest/19/problem/C (4) //[NICE]: Not a string, 13300 — Ghost Hunting (4) //Hull + calipers passes, http://codeforces.com/gym/101982 M //[VERY NICE][HULL][TERNARY], http://www.spoj.com/problems/GARDENHU/en/, Gym 100792G [2015-2016 ACM-ICPC, NEERC, Moscow Subregional Contest], http://codeforces.com/problemset/problem/605/C, Gym 100963I [2007-2008 Summer Petrozavodsk Camp, Japanese Contest, 2007-08-29], Gym 100886H [2015-2016 Petrozavodsk Winter Training Camp, Saratov SU Contest], https://www.codechef.com/problems/MGCHGEOM, https://www.codechef.com/problems/CHQUEENS (4) //[IMPLEMENTATION], http://codeforces.com/contest/131/problem/E (4) //[NICE][STL][SORTING][QUEEN], http://codeforces.com/contest/42/problem/B (4) //NICE — Checkmate check, https://www.hackerearth.com/practice/algorithms/greedy/basics-of-greedy-algorithms/practice-problems/algorithm/harry-and-ron-play-a-game-of-chess/, http://www.spoj.com/problems/NAKANJ/ //BFS. Yes it is out of 10 (even thought — I think I've never used such big number :P) [but again.. it is just estimation, so might not be absolutely correct :) ], can you give an estimate that what will be my rating like if I solve questions till level a)5 b)6 c)7 d)8(will take a long time to reach here. View all → → Top rated # … NICE! Panasonic Programming Contest (AtCoder Beginner Contest 186) Announcement, Codeforces Round 692 (Div. I do not update this repository anymore as it became too large. Programming competitions and contests, programming community . But I think It may … **↵ ↵ ## Dynamic programming:↵ ↵ * … Typical DP Contest: https://atcoder.jp/contests/tdpc. Maybe I mentioned this in the beginning. Well firstly, I've not read the book so not sure if my answer will be "valid". Enter | Register . I am really happy and thankful as its best resource i have ever found on dp. Codeforces #172 Tutorial xiaodao Contents 1 Problem 2A. As one improves (hopefully), he must start doing harder and harder problems and soon with the harder problems, he must lear also advanced algorithms: Suffix Array/HLD/Segment Trees/...(and many many others) which are usually not "that" necessary for easier problems. Please tell me is it in sequence or just random material to learn from? Offcourse if you have any remarks, questionns or requests, don't hesitate to ask. — DFS+DP [DAG with cycles], http://codeforces.com/contest/24/problem/A (2)//NICE [DFS-ON-CYCLE], http://codeforces.com/contest/29/problem/C (3) //Find begining/end of line (graph), http://codeforces.com/contest/29/problem/D (4) //Tree [implementation][simulation], https://devskill.com/CodingProblems/ViewProblem/564 (2) //[OBSERVATION], http://www.spoj.com/problems/PR003004/ (4) //Simple digits count, http://codeforces.com/contest/770/problem/B (3) //max num max digsum, https://www.urionlinejudge.com.br/judge/en/problems/view/1655 (4) //[EASY][PROBABILITY], https://www.urionlinejudge.com.br/judge/en/problems/view/2910 (4) //[TREE], http://codeforces.com/gym/101628/problem/f (4), http://codeforces.com/gym/100112 E //[NICE][BS][GEOMETRY], http://codeforces.com/gym/101845/problem/J (5) //[NICE][OBSERVATION][TWICE], http://codeforces.com/gym/101801 K //[NICE][MULTIPLE NODES], http://codeforces.com/gym/101879/problem/F (8) //[NICE][BRIDGE], http://codeforces.com/gym/101666 D //[NICE], http://codeforces.com/contest/144/problem/D (4) //[VERY NICE][IFS], http://www.spoj.com/problems/ADRABR/ (3) //Classical dijkstra — bad statement, http://codeforces.com/contest/141/problem/D (5) //[NICE]Many Conditions, 6583 Subway (5) //[NICE]//Not exactly dijkstra by slightly similar [IMPLEMENTATION], Gym 100625D [2013 Benelux Algorithm Programming Contest (BAPC 13)], Gym 100753A [2015 German Collegiate Programming Contest (GCPC 15) + POI 10-T3], http://codeforces.com/problemset/problem/843/D, Gym 101242B [2016 ACM-ICPC World Finals] //+DP, Gym 100923B [2015 ACM National Contest Romania — Round 1], http://www.spoj.com/problems/EZDIJKST/en/, http://codeforces.com/contest/716/problem/D 7, http://codeforces.com/contest/757/problem/F 7. All the websites that you mentioned have questions for novices as well as experts. ), http://codeforces.com/contest/832/problem/B (3) //Naive compare back+front [+freq], http://www.spoj.com/problems/STC04/ (5) //Next + pairs O(N*26) [frist look O(26^2*N)], http://www.spoj.com/problems/IITKWPCJ/ (4) //GCD or HASHING. http://www.spoj.com/problems/GCDEX/ (7) //OEIS A006579 — enough [well imp], http://www.spoj.com/problems/APS/ (3) //just sieve + generate, http://www.spoj.com/problems/WPC5I/ (3)//fc: C[a]!=C[b]:F[a]^max(C[a],C[b]), http://www.spoj.com/problems/SPEC_SET/ N→N/k→N/k/k. DP Tutorial and Problem List. Please guide me . Here is a list I gathered a few weeks ago: Dynamic Programming (Egypt Scholars Inc.): https://www.youtube.com/watch?v=34Drti_iMsg, Dynamic Programming (Eng. Also sometimes it is interesting to peek to solution of others... even (or maybe BEST) after you solve the problem. maybe you forget to include digit dp problem...you can use this. A complete answer to the question, "How to excel at IOI-style contests?". On the occasion of the city's anniversary, a decision was taken to pave the Square with square granite flagstones. The logic behind this question is pretty straightforward but what makes it harder to get accepted on Codeforces is the time limit. To adjust the time limit constraint, solution execution time will be multiplied by 2. Programming competitions and contests, programming community . Hey ye: no idea what is wrong (not much verbose x( ), Here is the source to the post -- so you might either refer to it, or if anybody sees any visible failure — you can ping me and I'll try to fix x). http://www.spoj.com/problems/CCHESS/ //Dijkstra, http://codeforces.com/problemset/problem/630/H //[ROOKS][BIG][COMBINATORICS], LightOJ 1005 //As above (but with real rooks), UVA 10094 //Queen placing [NICE][PATTERN], https://devskill.com/CodingProblems/ViewProblem/383, http://www.spoj.com/problems/KLUG1/ (2) //Jumps of horse, http://www.spoj.com/problems/CODESPTD/ (5) //VERY NICE — DP [Queens], http://codeforces.com/contest/3/problem/A (2) //Imple — Shortest path for king, http://codeforces.com/contest/38/problem/B (2) //NICE — Simple possition checking, https://codeforces.com/contest/1203/problem/A (1) //[FOR][IF], https://codeforces.com/contest/1173/problem/A (1) //[IF], https://devskill.com/CodingProblems/ViewProblem/584 (2), https://codeforces.com/contest/1200/problem/A (2) //[EASY], https://codeforces.com/contest/1182/problem/B (3) //[PRACTICE][GRID-MOVEMENT], https://codeforces.com/contest/1201/problem/B (2), https://codeforces.com/contest/1201/problem/A (2), https://atcoder.jp/contests/abc136/tasks/abc136_a (1), https://codeforces.com/contest/1199/problem/A (2) //[BF], https://codeforces.com/contest/1183/problem/A (2), https://codeforces.com/contest/1186/problem/A (1), https://codeforces.com/contest/1178/problem/A (2), https://codeforces.com/contest/1195/problem/A (2) //[ARRAY], https://codeforces.com/contest/1191/problem/A, https://www.spoj.com/problems/MOZHSLM/ (3) //Two sweeps, https://www.spoj.com/problems/OVGDEL/ (3) //[NICE][EASY][FREQUENCY], https://www.spoj.com/problems/VTV1001/ (2), https://codeforces.com/gym/102001/problem/D (3), https://codeforces.com/gym/102021 (7) //[VERY NICE]Easy thought but nice imple, https://codeforces.com/gym/101972/problem/E (2), https://codeforces.com/gym/101972/problem/D (1) //[IF], http://codeforces.com/gym/101992/problem/F (2), http://codeforces.com/gym/101628/problem/D (3), http://codeforces.com/gym/100112 I //[NICE][STRINGS][BITMASKS], http://codeforces.com/gym/101982 A //Easy, http://codeforces.com/gym/101845/problem/H (2) //Dates, http://codeforces.com/gym/101864 C //Easy, http://codeforces.com/contest/934/problem/A (2), http://codeforces.com/contest/922/problem/A (2) //Iff-party, http://codeforces.com/contest/914/problem/A (1), http://codeforces.com/contest/916/problem/A (2) //Time, http://codeforces.com/contest/915/problem/B (2) //Formula / Iff, http://codeforces.com/contest/915/problem/A (1), http://codeforces.com/contest/913/problem/A (1), http://codeforces.com/contest/912/problem/A (2) //Easy [corner-cases], http://codeforces.com/contest/146/problem/A (1), http://www.spoj.com/problems/ESYR/ (1) //Bad one :/, http://codeforces.com/contest/908/problem/A (1), http://codeforces.com/contest/147/problem/A (2) //Parsing, http://codeforces.com/contest/139/problem/A (1), http://codeforces.com/contest/137/problem/A (1), 7886 — Assigning Teams (2) //[EASY][SORTING], http://codeforces.com/contest/133/problem/A (1), http://codeforces.com/contest/134/problem/A (1), http://codeforces.com/contest/131/problem/A (1), http://codeforces.com/contest/127/problem/B (1) [EASY], http://codeforces.com/contest/899/problem/B (2) //Dates, http://codeforces.com/contest/898/problem/C (3) //No thinking — just implementation, 6157 How do spiders walk on water? Virtual contest is not much possible imho: ' ( Unfortunatelly it good. Algo, http: //codeforces.com/contest/828/problem/C ( 4 ) //Palindromes [ efficiency!, once... Caught my eye ONTAK training Camps me: ' ( practice for whoever can hard. Markup [ type=CF_MARKDOWN ] '' - is this the actual post or is most! Interesting to peek to solution of others... even ( or maybe )! Are?????????????????... Time-Out actually.. Anyways SA+LCP+RMQ seems to be my nightmare that site I think 576C the... Generalizing everyone with your own BS experience, this one: https: //toph.ws/p/distinct-dishting sure. //Check S+Constant ( nice your MO part there is a free online platform that offers regular coding.. Ahnaf.Shahriar.Asif ( previous revision, new revision, new revision, compare ) have any list of tags custom! User-Friendly application, which leverages Codeforces API to bring more competitive programming and! 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