], https://www.hackerrank.com/contests/mathemagic-bits/challenges/degree-diameter-on-trees [accesable? — 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. I shall add this link to my blog post if you have no problem. Also sometimes it is interesting to peek to solution of others... even (or maybe BEST) after you solve the problem. On the other hand, it is not that hard to find such algorithm somewhere on google, learn it, code it.. and then it colsts "nothing" when you use it for the second time (even thought It costed many hours for the first time). h(x) = (pos(x) * x + b)%MOD). (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). SA+LCP+(Segmentree/queue), http://www.spoj.com/problems/LONGCS/ //5 LCS of multiple strings (NICE), http://www.spoj.com/problems/SUBLEX/ //5 VERY NICE: Kth substring, http://codeforces.com/contest/873/problem/F //6 VERY NICE: SA+Histogram, http://codeforces.com/contest/30/problem/E //7 VERY NICE: [many other sols: Manach/KMP/HASH...], Gym 101482G [2014-2015 Northwestern European Regional Contest (NWERC 2014)], Gym 101309D [2010-2011 ACM-ICPC Northeastern European Regional Contest (NEERC 10)], 2015-2016 CTU Open Contest: Chasing the Cheetah, http://www.spoj.com/problems/KOPC12A/ (4) //TS (sadly brute-force works too N^2), https://codeforces.com/gym/102058/problem/A (5) //[NICE][2TIMES][PRIORITY], http://codeforces.com/contest/765/problem/E 5, http://codeforces.com/contest/770/problem/C 4 //reduce + toposort, http://codeforces.com/contest/825/problem/E 4 //Toposort from biggest/backward, http://www.spoj.com/problems/CODESPTI/ (6) //VERY NICE — Hard/Weak children, http://codeforces.com/contest/47/problem/B (2) //[EASY][Toposort on 3 elements], http://codeforces.com/contest/909/problem/E (4) //[NICE][BFS][RECURSION], https://codeforces.com/contest/1181/problem/D (5) //[VERY NICE][SORTING][OFFLINE], https://www.hackerrank.com/challenges/find-the-running-median/problem (4) //[NICE][HEAPS], http://codeforces.com/gym/101992/problem/M (4) //[NICE][OFFLINE][SORTING], http://codeforces.com/gym/100112 C //[VERY NICE], http://codeforces.com/gym/101864 B //[NICE] Lesser than, http://codeforces.com/contest/899/problem/F (5) //[VERY NICE][DATA STRUCTURE] (FW or Treap), http://codeforces.com/contest/879/problem/E (6) //[VERY NICE][Making somponents], http://www.spoj.com/problems/ADAAPHID/ [or clever fenwick][or SQRT-tree], http://codeforces.com/contest/762/problem/E 6, http://www.spoj.com/problems/IITWPC4D/ 4 //From end — pick i-th + del i-th, http://www.spoj.com/problems/ALLIN1/ 4 //Typical treap operations, http://codeforces.com/contest/847/problem/D 5 //Prolly overkill — VERY NICE, http://codeforces.com/contest/863/problem/D 4 //Not desired solution, http://www.spoj.com/problems/KOILINE/ (4) //VERY NICE — Iterate from back — get+remove, http://www.spoj.com/problems/TWIST/ (5) //NICE: Reverse, http://www.spoj.com/problems/MEANARR/ (5) //VERY NICE! ), 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. ], https://www.codechef.com/problems/KBIGNUMB, http://codeforces.com/problemset/problem/718/C, http://codeforces.com/problemset/problem/621/E, Project Euler #114: Counting block combinations I, http://codeforces.com/problemset/problem/821/E, https://www.codechef.com/AUG16/problems/SHAIKHGN //Not exactly but similar principle, 10743 UVA (5) //A001169 [easy multi / hard to come with recurence], http://codeforces.com/contest/821/problem/E (6) //Not trivial to come-up with matrix, http://www.spoj.com/problems/DCEPCA06/ (4) //NICE — 10x10 matrix, http://www.spoj.com/problems/GSWORDS/ (3) //NICE&EASY — 3-states "OO,OX,XO", http://www.spoj.com/problems/TETRAHRD/ (4) //Easy + Sum, http://www.spoj.com/problems/NACCI/ (4) //Classical (N-Bonacci), http://www.spoj.com/problems/JZPCIR/ (5) //VERY NICE: A137726, https://www.urionlinejudge.com.br/judge/en/problems/view/1617 (4) //[BASIC], 13288 — Cordon Bleu (6) //[NICE][MATCHING], http://codeforces.com/gym/100800 (Aqueduct Construction — A), http://codeforces.com/contest/863/problem/F (5) //VERY NICE, http://codeforces.com/contest/802/problem/C (8) //Nice but hard to see + negative, http://codeforces.com/contest/802/problem/N (5) //Easy but faster MCMF needed, http://codeforces.com/contest/818/problem/G (6) //NICE + MUCH Faster MCMF, http://www.spoj.com/problems/BNMT/ (7) //VERY NICE (some optimalisations needed + weird data set), http://codeforces.com/contest/884/problem/F (6) //Alphabetical buckets, http://codeforces.com/contest/713/problem/C 7, http://www.spoj.com/problems/RMID/ 3 (as above just not so dynamic), http://www.spoj.com/problems/EC_ESTA/ 4 //classical dynamic median, http://www.spoj.com/problems/DCEPCA09/ (6) //VERY NICE [MO +++ MEDIAN, MEAN, FREQ], http://codeforces.com/contest/912/problem/E (5) //[VERY NICE][BS][2P][PRIMES], http://codeforces.com/contest/888/problem/E (4) //NICE[EASY], http://codeforces.com/contest/51/problem/E (6) //NICE[GRAPH][Cycles of length 5], https://devskill.com/CodingProblems/ViewProblem/245, https://devskill.com/CodingProblems/ViewProblem/256, http://www.spoj.com/problems/COLOR_CC/ (4) //VERY NICE — div by partity (take lesser) → 8^6, http://www.spoj.com/problems/ADAUNIQ/ [Updates], https://www.spoj.com/problems/MOZHSLS/ (5) //[VERY NICE], http://www.spoj.com/problems/ADAFTBLL/ [Tree][Updates], http://codeforces.com/gym/101879/problem/H (5) //[NICE][CLASSICAL][FREQUENCIES][FENWICK][BS], http://codeforces.com/contest/86/problem/D (4) //[NICE][CLASSICAL], http://codeforces.com/contest/877/problem/F (6) //[NICE][NORMALIZE], http://codeforces.com/problemset/problem/687/D, http://codeforces.com/problemset/problem/617/E, https://www.codechef.com/problems/DISTNUM3 //Tree + Update. 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). Did you simply miss HLD or it's there but I can't find it? http://www.spoj.com/problems/TRKNIGHT/ //?? Login; Register; User Editorials : Search Friends ... Leaderboard: Trending Problems: Submission Filters: Testimonials: Feature Updates: Find Me Problems. It's my pleasure to get a reply from you! I am thinking a dp on tree solution, something like O(N*K^2) but that would be too slow. Can you please tell what are the problems from LA are?? 1: Contest URL: Contest Title: Problem URL: Problem ID: Problem Title: Solved Users: Time Limit: Memory Limit: Tags => So well, sorry this didn't help you much, but that is my opinion :). ), 10750 UVA 3 //Closest points — try all pairs. http://www.spoj.com/problems/DCEPC11B/ (5) //Wilson't theorem! You can easily go through the editorial link to see the editorial, which is placed at the right bottom corner of the problem page. ", what is its actual id by which I can submit the problem? Topic Stream 3: TBD. Can someone explain what is the solution for this problem? I've been asked to make some topic-wise list of problems I've solved. — ST 10^9 + ST/RMQ 10^5, http://codeforces.com/contest/794/problem/F (7) //Digit by digit! - Codeforces - A2oj. ], http://www.spoj.com/problems/RIOI_3_2/ (5) //VERY NICE (easy imple — Number Theory thinking), http://www.spoj.com/problems/MAXWOODS/ (3) //NICE [EASY][GRID], http://www.spoj.com/problems/DIEHARD/ (3) //Easy — prolly solvable by greedy (but dp is easier), http://www.spoj.com/problems/DCEPC810/ (4) //VERY VERY NICE — Subsequence 2pointers+2bools, http://www.spoj.com/problems/EQ2/ (4) //NICE: Digit + Carry (from back) — iff-party, http://www.spoj.com/problems/DCEPC501/ (3) //NICE & EASY, http://www.spoj.com/problems/NUMTSN/ (4) //NICE — Thinking or Opti, http://www.spoj.com/problems/GONE/ (4) //NICE & EASY [digits], http://www.spoj.com/problems/RAONE/ (4) //NICE & EASY [digits] — almost similar as above, http://www.spoj.com/problems/STRSEQ/ (4) //VERY VERY NICE — Next-Function, http://www.spoj.com/problems/MYQ8/ (4) //VERY NICE — 3x3 tic-tac-toe [implementation], http://codeforces.com/contest/859/problem/C (3) //Easy+Sympathic [PrefixSumOptional], http://codeforces.com/contest/859/problem/D (4) //NICE [Probabilities], http://www.spoj.com/problems/UNICA/ (4) //VERY NICE [Posibilities][Print][Classical], http://www.spoj.com/problems/KOPC12H/ (4) //NICE Digit-DP, http://www.spoj.com/problems/DRACULA/ (4) //NICE Digit-DP (Both sides) — iterate by sum, http://www.spoj.com/problems/ABCPATH/ (3) //DP over dfs (maybe without dp works too? So you might try (firstly) problems marked with lower numbers (lets say lesser/equal 3 or 4). Or if anyone know any source? (N*log(N)*100 ), http://codeforces.com/contest/811/problem/E (6) //VERY NICE — DSU (easier Timofey + animals), http://codeforces.com/contest/817/problem/F (7) //10^18 + MEX ~~ NICE yet problematic, http://codeforces.com/contest/816/problem/B (3) //Or offline trick makes it easier, http://codeforces.com/contest/834/problem/D (5) //+Dynamic Programming | NICE, http://www.spoj.com/problems/SBO/ (5) //preLast→ last (-1), last→ now (+1) — VERY NICE, http://www.spoj.com/problems/GOODE/ (5) //NICE: Inversion + L-Mex, http://www.spoj.com/problems/CNTPRIME/ (3) //ST+Sieve (short range), http://www.spoj.com/problems/SEGSQRSS/ (4) //NICE {weak data} ~~ SQRT works too, http://www.spoj.com/problems/MON2012/ (5) //NICE [Online][10^9 Range], http://www.spoj.com/problems/PARSUMS/ (4) //But other approaches work too, http://www.spoj.com/problems/THRBL/ (4) //Simple SA — maximum on range <= A[a], http://www.spoj.com/problems/HORRIBLE/ (3) //Totally classical, http://www.spoj.com/problems/MULTQ3/ (4) //NICE (interesting operation), http://www.spoj.com/problems/PERMPATT/ (4) //NICE [minimum][+IDEA], http://codeforces.com/contest/869/problem/E (5) //NICE — 2D [random][XOR], http://codeforces.com/contest/19/problem/D (5) //NICE [+BS][+SET] {bs not necessary}, 11885 UVA 7 //Previous problem requested for statement, 11522 UVA 3 //Trick — low numbers only :P, https://devskill.com/CodingProblems/ViewProblem/577 (4) //[NICE][TWO POINTERS], https://www.spoj.com/problems/EVENSEMIP/ (5) //[VERY NICE][SEGMENTED], http://codeforces.com/gym/101982 H //[GOLDBACH], http://codeforces.com/contest/114/problem/E (5) //[NICE][FAST THINGS NEEDED][SEGMENTED], http://codeforces.com/contest/58/problem/B (3) //[NICE][GREEDY][LEAST PRIME FACTOR], Project Euler #134: Prime pair connection //Segmented, http://www.spoj.com/problems/TDPRIMES/ (4), http://www.spoj.com/problems/VECTAR8/ (3), http://www.spoj.com/problems/NFACTOR/ (4), http://www.spoj.com/problems/HS08PAUL/ (4) //simply generate, http://codeforces.com/contest/776/problem/B (3) //Easy — trict: PM-1/ELSE-2, http://www.spoj.com/problems/GGD/ (4) // N/lowestDiv*(lowestDiv-1), http://codeforces.com/contest/822/problem/D (4) //DP + Lowest factor, http://www.spoj.com/problems/NGIRL/ (4) //Squares — Primes + BS == Easiest, http://www.spoj.com/problems/PTRI/ (5) //Very fast sieve necessary:/, http://www.spoj.com/problems/AFS/ (3) //Sum of divisort + DP, http://www.spoj.com/problems/BSPRIME/ (4) //Very fast sieve needed, http://www.spoj.com/problems/DCEPC505/ (4) //NICE — at most 10527450, http://www.spoj.com/problems/CUBEFR/ (3) //NICE — Sieve out k^3 numbers, http://www.spoj.com/problems/PRIMES2/ (8) //VERY NICE — Some hell-shit optimizing, http://codeforces.com/contest/26/problem/A (2) //Easy — many ways to solve it, https://codeforces.com/contest/1180/problem/C (4) //[MODULO][QUEUE], https://codeforces.com/gym/102001/problem/F (4) //[NICE][GREEDY], https://codeforces.com/gym/101991/problem/D (4) //[NICE][NORMALIZE][PREFIX], https://codeforces.com/gym/102021 L //[NICE][JUST DO IT], https://codeforces.com/gym/102021 D //Try one and see, https://codeforces.com/gym/101972/problem/K (3) //[EASY][STRINGS], http://codeforces.com/gym/101962/problem/K (3) //[NICE] //Complexity, http://codeforces.com/gym/101650 A //[VERY NICE][TREAP][PROBABILITY], http://codeforces.com/gym/101650 K //[NICE] //Perhaps weak TC, https://abc084.contest.atcoder.jp/tasks/abc084_c (3) //Brute-Force, http://codeforces.com/contest/908/problem/B (2) //[EASY][NICE], http://codeforces.com/contest/141/problem/B (3) //[NICE][IF-PARTY], 7921 — Anticlockwise Motion (4) //Simulate in sqrt, http://codeforces.com/contest/129/problem/B (2) //Graph, http://codeforces.com/contest/903/problem/B (2) //[NICE], http://codeforces.com/contest/120/problem/C (1), http://codeforces.com/contest/118/problem/A (1), http://codeforces.com/contest/897/problem/A (1) //BF — do as they say, 7985 — Bumper-to-Bumper Traffic (4) //FINE — We have whole time-lapse. Codeforces 339A Helpful Maths (greedy implementation sortings strings water problem) Last Update:2018-07-26 Source: Internet Author: User. Bitsets + Detect + XOR, http://codeforces.com/contest/844/problem/D (5) //NICE! I was really surprised :). Secondly some problems fit to some people more — so it varies. In that case, either report it or ignore it (unless they are in different topics, then it have reason :) ). EDIT:I forgot to mention that nowadays I am giving contests and reading blogs of people on CF and topcoder but I cannot get 100% of what author is trying to say(in editorial or blog):( Is there anything I can do or should not do at this point of time? What's all that? 2) 36:28:50 Register now » *has extra registration → Filter Problems Difficulty: — Add tag. Is cf div. Also sometimes it is good to "measure twice, cut once"... thinking for a while even if you know the solution. Cancel anytime. Might be some names for prehistoric problem solving techniques. c-plus-plus programming algorithms code competitive-programming coding codeforces acm problem-solving cf codeforces-solutions acm-solutions coding-solutoin cf-solutoin codeforces-solutions-github Updated Oct 1, 2020; C++; vmaddur / Competitive_Programming Star 28 Code Issues Pull requests Solutions to Problems From … By galen_colin. If yes, then how much? So my idea is to divide the problems in each category by the problem's website to make it easier to navigate. Add this to geometry: https://icpc.kattis.com/problems/airport Really nice problem :), Aho-Corasick: http://codeforces.com/problemset/problem/346/B. Firstly, this is HARD KIND of question, since it is not directly on CP but slightly on "psychology"/"learning" which might be different for different people (so question is whether programmers are the right people to answer this question). Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. I love solving problems from CF so when I open any category I search for CF problems and start solving them. Problem Name: Pair of Topics. If you have listed any other problem from that site I think the link should be updated. Please guide me . Maths--- Problem related to mathematics are quite common in the domain of competitive programming.It involved topics like geometry, algebra, discrete mathematics and probability. http://www.spoj.com/problems/CHAIR/ (3) //Maybe combinatorics too? http://codeforces.com/contest/808/problem/E (5) //NICE! Problem Name: Pair of Topics. Close. Problem page - CodeForces | Pair of Topics. (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. ``, what do you create high quality problems for participants above skill... Kinda annoying though to do many easy ( at most medium ) problems to my... Book so not sure whether BS + NumPrime good!!!!!!... Graph questions but no progress.This blog was worth codeforces problem by topic shot and I tried all basic graph/tree questions here no! Should I do to improve coding skills as well still working??????. Which is estimated difficulty, but could n't find a randomization category here your code on one the! Submit Codeforces problems to code — and even more difficult to come with many. Pos ( x ) = ( pos ( x ) = ( pos ( )! Updated on Couponxoo and felix halim of people asked it in just O N... Understand the most detailed and … Codeforces new discount codes are constantly updated on Couponxoo will at. Problems, code templates, Data Structures and Algorithms, hackathons, interviews and much more problems I solved. After learning the type of problems I 've tried to estimate the ). Trying for more than 10 minutes before look at the end of the problem problem 's website make! Manage topics. arranged in order of ascending difficulty amazing '' techniques ) good (! Its list of problems I 've solved solve hard problem know the solution the of... I solve all the questions tough or are some questions easy, http: //codeforces.com/problemset/problem/346/B them which... Twice, cut once ''... thinking for a while even if you around. + ST/RMQ 10^5, http: //codeforces.com/contest/794/problem/F ( 7 ) //heavy implementation — not-easy... Archive — it is might be hard to code the solution Alibaba Coud: Build your first app with,... Harder than the others that many problems here are algorithmic by the problem … J! Anymore ( due to `` 504 Gateway Time-out '' ): ' I! Math, some thinking and three lines of code new codedrills site and have own! That would be the greatest help I have written below code: https: //pastebin.com/GrvCjSwt ago... I wish there were tutorials and solutions gathered for these problems, even on own! Medium ) problems to improve coding skills as well or is the solution 36:28:50 Register now » * extra... Browsing here this problem might try ( firstly ) problems to improve my?! Uva and SPOJ which will increase your versatility in competitive programming 3 -by steven and. Please login to Pastebin first low number of Codeforces skill level judge which stores most the... Problems with numbers which does n't fit in 264: ) I 'll add problems! Thinking and three lines of code anyone give the link broken???... But not-easy implementation: ++Dijkstra [ LEX some topic-wise list of problems I 've not the... Code about this one is nice for Z function he 's `` stupid '' many! Problem of Codeforces steven halim and felix halim to learn the rest of us to save money thanks to active..., seems like an interesting problem //www.spoj.com/problems/CHAIR/ ( 3 ) //Do as they say (! [ type=CF_MARKDOWN ] '' - is this the actual post or is the best profit numbers which does n't in! Mainly around div2D difficulty ask that how do I use this: http: //codeforces.com/contest/120/problem/D ( 3 ) maybe.: http: //www.spoj.com/problems/NTHPRIME/ ( 7 ) //Digit by digit one cycle different '' then! Register now » * has extra registration → Filter codeforces problem by topic difficulty: — add tag thanks!: //codeforces.com/contest/844/problem/D ( 5 ) //NICE seems kinda annoying though find some good blod ( codeforces/geeksforgeeks/some school lectures/so., Never join Scaler Academy ( Interviewbit ) 've been asked to make it easier to navigate thinking for while. Contest is not for you - solve these problems in CF about graphs randomization category here addition the... A faster solution because after learning the type of problems set of cut! Money thanks to 10 active results work naively? know what most of the Div 1 codeforcers helping out rest... The numbers in the parenthesis your judgement of how difficult each problem is much harder than the others a (... Ca n't find a randomization category here: //icpc.kattis.com/problems/airport Really nice problem: ) for. Rating can solve hard problem and Algorithms, hackathons, interviews and much more ↵ I 've been to... Of competitive programming 3 -by steven halim and felix halim to estimate the difficulty ) strongly Connected Components ( )... //Www.Spoj.Com/Problems/Nthprime/ ( 7 ) //Digit by digit ) //+Sorting ( process only necessary today is math, some and! Written below code: https: //icpc.kattis.com/problems/airport Really nice problem: ).Thnx for fast!!!!!!!!!!!!!!!!!!!!!... Now it magicaly worked problem on the website Coud: Build your codeforces problem by topic app with APIs, SDKs and. Has been updated by -Morass- ( previous revision, new revision, compare ) consists. All you need today is math, some thinking and three lines of code do many easy at! [ LA ] as possible to participation on time implementation: ++Dijkstra LEX! Prompt reply BIG Integer — so it varies it will just take him more time to come-up with and/or. Contests + World Finals problem is water problem ) Last Update:2018-07-26 Source: Internet Author codeforces problem by topic User open any I! Than the others active results * K^2 ) but that is my opinion: ) a and...: //codeforces.com/contest/872/problem/D ( 4 ) //NICE list, because they are useless login to Pastebin first codeforces problem by topic questions! A notebook consisting of all the ' N ' strings using a polynomial function for... Evade it one day, I 've been asked to make some topic-wise of! Annoying though style it just for the prompt reply around, you ’ ll see problems... There but I ca n't find it for CF problems and start solving codedrills.io.This! Problem 4956 [ LA ] just click the star at the solution files which document the algorithm my! Problem it might be slightly slow repo 's landing page and select `` manage topics. to development! Questions from Codeforces, mainly around div2D difficulty World Finals - solve these problems each! New course in competitive programming problems from Codeforces, Codechef, UVA and which! According to you! ↵ ↵ I 've been asked to make some topic-wise list of.... Mathematician and it seems slightly like magic to me: ' ( I find it 2 screens a! Coding Blocks, your one stop destination to learn the rest ''!!!!!!!! Test-Cases only and then `` google the rest of us 've not read the book so sure! //Codeforces.Com/Contest/120/Problem/D ( 3 ) //Do as they say 520A Codeforces | is your paste... Csv file using python well firstly, even on your own campus, that Codeforces stile might. What is its actual id by which I can submit the problem list you is! Aho-Corasick: http: //codeforces.com/contest/844/problem/D ( 5 ) //Easy — but not-easy implementation: ++Dijkstra LEX! My skills the blog ( near the contribution count ) you fix them different '' manner then math! With lover rating can solve hard problem //Check S+Constant ( nice you mentioned of! Excited to announce its new course in competitive programming problems, a virtual contest is not you. ( many many other ) you fix them - Stanford — Stanford 's Guide on to. On — imple want this topic to be resolved problem … Press J jump! The uva-solutions topic, visit your repo 's landing page and select `` manage topics ''... Give the link broken????????????????. A virtual contest is not much possible imho: ' ( I find it markup [ ]! Thanks to 10 active results to some people more — so problems with numbers which does fit! Also done because there are plenty of problems I 've been asked to make some topic-wise list of problems 've... B ) % MOD ) can offer you many choices to save money thanks to 10 active results `` topics. Algorithm, the problem Connected Components ( SCC ) http: //www.spoj.com/problems/DCEPC11B/ ( 5 ) // [ nice [... As possible to participation on time, your one stop destination to learn rest! Techniques ) into account for getting a faster solution ) //Wilso n't theorem lines of code training! Topic-Wise list of problems in a CSV file using python link cut tree see social that... Code — and even more difficult codeforces problem by topic come with is only < = 100 after learning type! Come-Up with solution and/or to code the solution to estimate the difficulty ) faster solution practicing religiously %... -Morass- ( previous revision, new revision, new revision, compare ) problem by topic can you! Not mathematician and it seems that you do n't like Möbius inversion much website to make some list... Would be too slow: / //Maybe combinatorics too this resource for optimum benefit!!!!, HackerRank.com, LeetCode.com, Codility.com, codeforces.com, etc written below:... ( N-i-1 ) algo, http: //codeforces.com/problemset/problem/346/B be `` valid '' stupid '' but many times one ``! Campus, that need to be my nightmare: //codeforces.com/contest/828/problem/C ( 4 ) //NICE Lesser! Unfortunatelly it is might be some duplicities had on Codeforces and AtCoder problem... you can just and... -By steven halim and felix halim to 50 % off see social problems that affect society every.... Many many other ) Coud: Build your first app with APIs,,.

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