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37,000 problems · all sources
- Words on Tree2600Codeforces2-satdfs and similardsugraphs
- Working routine2500Codeforcesdata structuresimplementation
- World Evil2700Codeforcesdpflows
- World of Darkraft2500Codeforcesdpgames
- World of Darkraft - 22700Codeforcesdpprobabilities
- Write The Contest2500Codeforcesbinary searchdpmath
- Wrong Answer on test 233 (Hard Version)2400Codeforcescombinatoricsmath
- X and Two Groups2759CodeChef
- X-OR2700Codeforcesbitmasksconstructive algorithmsdivide and conquerinteractive
- X-mouse in the Campus2600Codeforcesbitmasksmathnumber theory
- XOR Break --- Game Version2400Codeforcesbitmasksgamesgreedyinteractive
- XOR Counting2600Codeforcesbitmaskscombinatoricsdpmath
- XOR Matrix2500Codeforcesbitmaskscombinatoricsdpimplementation
- XOR Partition2700Codeforcesbinary searchbitmasksdata structuresdivide and conquer
- XOR Sum2707CodeChef
- XOR Tree2697CodeChef
- XOR Tree2400Codeforcesbitmasksdata structuresdfs and similardsu
- XOR Triangle2500Codeforcesbitmasksbrute forceconstructive algorithmsdp
- XOR with Add X2822CodeChef
- XOR, The Detective2839CodeChef
- XOR, Tree, and Queries2500Codeforcesbitmasksconstructive algorithmsdfs and similardsu
- Xenia and Tree2400Codeforcesdata structuresdivide and conquertrees
- Xometry (Hard Version)2624CodeChef
- Xoperations2759CodeChef
- Xor Array2897CodeChef
- Xor Separation2771CodeChef
- Xor Spanning Tree2400Codeforcesdivide and conquerfftgraphs
- Xor of 32500Codeforcesbrute forceconstructive algorithmsgreedytwo pointers
- Xor of Median (Easy Version)2700Codeforcesbitmasksbrute forcecombinatoricsdp
- Xor-Grid Problem2700Codeforcesbitmasksconstructive algorithmsdpimplementation
- Xor-Subsequence (hard version)2400Codeforcesbitmasksdata structuresdpstrings
- Xor-matic Number of the Graph2600Codeforcesbitmasksgraphsmathnumber theory
- Xorangements2795CodeChef
- Xorcerer's Stones2500Codeforcesbitmasksconstructive algorithmsdptrees
- Xorderable Array2600Codeforcesbitmasksdata structures
- Xorred2830CodeChef
- Xum2500Codeforcesbitmasksconstructive algorithmsmathmatrices
- Y Figures2863CodeChef
- Yaroslav and Algorithm2500Codeforcesconstructive algorithms
- Yaroslav and Points2500Codeforcesdata structures
- Yet Another Bitwise Problem2808CodeChef
- Yet Another Chef And Numbers2820CodeChef
- Yet Another DAG Problem2600Codeforcesbitmasksdfs and similardpflows
- Yet Another LCP Problem2600Codeforcesdata structuresstring suffix structures
- Yet Another Maxflow Problem2700Codeforcesdata structuresflowsgraphs
- Yet Another Mex Problem2815CodeChef
- Yet Another Minimization Problem2500Codeforcesdivide and conquerdp
- Yet Another Tree Problem2890CodeChef
- Yet Another XOR Sort2732CodeChef
- Yet another MEX problem2789CodeChef
- Yet another substring problem2665CodeChef
- You2600Codeforcesdfs and similardpmathnumber theory
- You Are Given Some Letters...2700Codeforcesbinary searchimplementationmath
- You Are Given Some Strings...2400Codeforcesbrute forcestring suffix structuresstrings
- Yunli's Subarray Queries (extreme version)2700Codeforcesdata structuresdpimplementation
- Yurii Can Do Everything2500Codeforcesbinary searchbitmasksbrute forceconstructive algorithms
- Zawad and Index Sum2634CodeChef
- Zebra-like Numbers2400Codeforcesbitmasksbrute forceconstructive algorithmsdfs and similar
- Zero Array2754CodeChef
- Zero Trailing Factorial2400Codeforcesbrute forcemathnumber theory