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- SUM and REPLACE2000Codeforcesbrute forcedata structuresdsunumber theory
- Sakura Adachi and Optimal Sequences2000Codeforcesbitmaskscombinatoricsgreedymath
- Salary Changing1900Codeforcesbinary searchgreedysortings
- Salyg1n and Array (simple version)2000Codeforcesconstructive algorithmsinteractivemath
- Same Sum Blocks (Easy)1900Codeforcesgreedy
- Same Sum Blocks (Hard)1900Codeforcesdata structuresgreedy
- Sanae, Cross and Color1900Codeforcesbinary searchdata structuresimplementation
- Sasha and a Walk in the City1900Codeforcescombinatoricsdpmathtrees
- Saving a gift of love2265CodeChef
- Scam2287CodeChef
- Scarecrow2000Codeforcesgreedyimplementationmath
- Score of a Tree1900Codeforcesbitmaskscombinatoricsdfs and similardp
- Sealing up2319CodeChef
- Search for 4042296CodeChef
- Searchlights2000Codeforcesbinary searchbrute forcedata structuresdp
- Seasons1900Codeforces*special
- Second price auction2000Codeforcesbitmasksprobabilities
- Sed Max2317CodeChef
- Seek the Truth2000Codeforcesbinary searchbitmasksconstructive algorithmsinteractive
- Segment Tree Reconstruction2208CodeChef
- Segments1900Codeforcesgreedysortings
- Segments Removal2000Codeforcesdata structuresdsuflowsimplementation
- Selection Sort2000Codeforcesbinary searchdata structuresgreedytwo pointers
- Selection for Training Camps2318CodeChef
- Self-Produced Sequences2000Codeforces*specialcombinatoricsmath
- Seller Bob2000Codeforcesbrute forcedpgreedy
- Sequence Search2204CodeChef
- Sequence Sorting2000Codeforcesdpgreedytwo pointers
- Sereja and Ballons2265CodeChef
- Sereja and Brackets2000Codeforcesdata structuresschedules
- Sereja and D2233CodeChef
- Sereja and GCD2396CodeChef
- Sereja and GCD 22373CodeChef
- Sereja and Game 22367CodeChef
- Sereja and LCM2376CodeChef
- Sereja and Periods2000Codeforcesbinary searchdfs and similarstrings
- Sereja and Random Array2315CodeChef
- Sereja and Subsequences2000Codeforcesdata structuresdp
- Sereja and Two Strings 22296CodeChef
- Sereja and the Arrangement of Numbers2000Codeforcesgraphsgreedysortings
- Sereja and two strings2304CodeChef
- Sereja ans Anagrams1900Codeforcesbinary searchdata structures
- Sergey and Subway2000Codeforcesdfs and similardptrees
- Serval and Kaitenzushi Buffet2000Codeforcesdata structuresgraph matchingsgreedy
- Serval and Rooted Tree1900Codeforcesbinary searchdfs and similardpgreedy
- Shaass and Lights1900Codeforcescombinatoricsnumber theory
- Shark1900Codeforcesbrute forcedata structuresdsutrees
- Shave Beaver!1900Codeforcesdata structures
- Sheriff's Defense2000Codeforcesdfs and similardpgreedytrees
- Shichikuji and Power Grid1900Codeforcesdsugraphsgreedyshortest paths
- Shift + Esc1900Codeforcesbrute forcedp
- Shifted Palindrome2296CodeChef
- Shooting (Easy)2372CodeChef
- Shop Game1900Codeforcesdata structuresgreedymathsortings
- Short Permutation Problem1900Codeforcescombinatoricsdpfftmath
- Shorten the Array1900Codeforcesbinary searchbitmasksdata structuresdfs and similar
- Shortest Cycle1900Codeforcesbitmasksbrute forcegraphsshortest paths
- Shortest Path2000Codeforcesgraphsshortest paths
- Shuffle2000Codeforcescombinatoricsmathtwo pointers
- Shuffling Songs1900Codeforcesbitmasksdfs and similardpgraphs