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- Wishcraft2105CodeChef
- Wizards and Huge Prize1800Codeforcesdpmathprobabilities
- Wizards and Minimal Spell1700Codeforcesimplementationstrings
- Wolf1800Codeforcesbinary searchgreedymath
- Wonderful City1700Codeforcesdpimplementation
- Wonderful Randomized Sum1800Codeforcesgreedy
- Wooden Fence1800Codeforcesdp
- Word Cut1700Codeforcesdp
- World is Mine1800Codeforcesdpgames
- Worldwide Playlist1700Codeforcesmath
- Writing Code1800Codeforcesdp
- XK Segments1700Codeforcesbinary searchmathsortingstwo pointers
- XOR Equation1700Codeforcesdpmath
- XOR Game2087CodeChef
- XOR Game2028CodeChef
- XOR-convenience (Hard Version)1800Codeforcesbitmasksconstructive algorithmsmath
- XOR-pyramid1800Codeforcesdp
- XOUR1700Codeforcesdata structuresdsusortings
- Xenia and Bit Operations1700Codeforcesdata structurestrees
- Xenia and Colorful Gems1700Codeforcesbinary searchgreedymathsortings
- Xenia and Weights1700Codeforcesconstructive algorithmsdfs and similardpgraphs
- Xenolith? Hippodrome?1800Codeforces*specialnumber theory
- Xmas or Hysteria1700Codeforcesconstructive algorithmsgreedyimplementationmath
- Xor Equation2198CodeChef
- Xor It2185CodeChef
- Xor-Subsequence (easy version)1800Codeforcesbitmasksbrute forcedpstrings
- Yalalovichik Numbers2198CodeChef
- Yamakasi1800Codeforcesbinary searchbrute forcedata structuresgreedy
- Yaroslav and Sequence1800Codeforcesconstructive algorithms
- Yet Again a Subarray Problem2102CodeChef
- Yet Another Array Game2183CodeChef
- Yet Another Array Queries Problem1800Codeforcesdata structuresimplementation
- Yet Another Ball Problem1700Codeforcesconstructive algorithmsimplementation
- Yet Another Minimization Problem1800Codeforcesdpgreedymath
- Yet Another Monster Fight1700Codeforcesbinary searchdpgreedyimplementation
- Yet Another Monster Killing Problem1700Codeforcesbinary searchdata structuresdpgreedy
- Yet Another Real Number Problem1800Codeforcesbinary searchdata structuresdivide and conquergreedy
- Yet Another Task with Queens1700Codeforcessortings
- Yet Another Tournament1700Codeforcesbinary searchgreedysortings
- You Are Given a Decimal String...1700Codeforcesbrute forcedpshortest paths
- Zebra Tower1700Codeforces*specialdata structuresgreedysortings
- Zero Path1700Codeforcesbrute forcedata structuresdpgraphs
- Zero Tree1800Codeforcesdfs and similardpgreedytrees
- ZgukistringZ1800Codeforcesbrute forceconstructive algorithmsimplementationstrings
- Zoo1700Codeforcesbrute forcegeometry
- Zookeeper and The Infinite Zoo1800Codeforcesbitmasksconstructive algorithmsdpgreedy
- bHTML Tables Analisys1700Codeforcesexpression parsing
- c8kbf and Tree2001CodeChef
- k-Interesting Pairs Of Integers1700Codeforces*specialbitmasksbrute forcemeet-in-the-middle
- k-th equality1700Codeforcesbrute forceimplementationmath
- Игра в Девятку I1800Codeforces*specialbrute forcedp
- Красивая команда1700Codeforces*specialcombinatoricsmath
- Фото на память - 2 (round version)1700Codeforcesdpgreedy
- ''a'' String Problem2000Codeforcesbrute forcehashingimplementationmath
- 0-1 MST1900Codeforcesdfs and similardsugraphssortings
- 0000011900Codeforces*special
- 1-1-1, Free Tree!2000Codeforcesbrute forcedata structuresdfs and similargraphs
- 1-Trees and Queries2000Codeforcesdata structuresdfs and similarshortest pathstrees
- 1D Sokoban1900Codeforcesbinary searchdpgreedyimplementation
- 2+ doors1900Codeforces2-satbitmasksgraphsgreedy