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- Servers1300Codeforcesimplementation
- Set Construction1400Codeforcesconstructive algorithmsdfs and similargraphsgreedy
- Set Difference 1729CodeChef
- Sets and Union1300Codeforcesbitmasksbrute forceconstructive algorithmsgreedy
- Sharky Surfing1300Codeforcesdata structuresgreedytwo pointers
- Shashlik Cooking1300Codeforcesdpgreedymath
- Shawarma Tent1300Codeforcesbrute forcegeometrygreedyimplementation
- Sherlock and the Grid1693CodeChef
- Shift And Sort1689CodeChef
- Shopping1400Codeforcesbrute force
- Shuffle1300Codeforcesmathtwo pointers
- Silly Mistake1400Codeforcesgreedyimplementation
- Simple Game1300Codeforcesconstructive algorithmsgamesgreedyimplementation
- Simple Polygon Embedding1400Codeforcesbinary searchgeometrymathternary search
- Simple Strings1300Codeforcesdpgreedystrings
- Skibidi Table1400Codeforcesbitmasksimplementation
- Skibidus and Fanum Tax (hard version)1300Codeforcesbinary searchgreedy
- Skier1400Codeforcesdata structuresimplementation
- Slay the Dragon1300Codeforcesbinary searchgreedysortingsternary search
- SnackUp1628CodeChef
- Snake Snaky1777CodeChef
- Snow Footprints1300Codeforcesgreedyimplementation
- Social Distance1300Codeforcesconstructive algorithmsgreedymath
- Social Network (hard version)1300Codeforcesdata structuresimplementation
- Sofia and the Lost Operations1300Codeforcesconstructive algorithmsgreedy
- Soldier and Cards1400Codeforcesbrute forcedfs and similargames
- Sonya and Exhibition1300Codeforcesconstructive algorithmsgreedyimplementationmath
- Sonya and Queries1400Codeforcesdata structuresimplementation
- Sonya and Robots1400Codeforcesconstructive algorithmsimplementation
- Sort the Array1300Codeforcesimplementationsortings
- Sorted Groups1786CodeChef
- Sorting by Subsequences1400Codeforcesdfs and similardsuimplementationmath
- Space Formula1400Codeforcesgreedy
- Special Offer! Super Price 999 Bourles!1400Codeforcesimplementation
- Special Task1400Codeforcesmath
- Spiders1400Codeforcesdpgreedytrees
- Splitting money1400Codeforcesimplementation
- Spoilt Permutation1300Codeforcesimplementation
- Sports Betting1400Codeforces2-satbrute forcemathsortings
- Spreading Charges1708CodeChef
- Spyke Chatting1300Codeforcesimplementation
- Square Earth?1300Codeforcesdfs and similargreedyimplementation
- Sridhar Likes Travelling1656CodeChef
- Stack of Presents1400Codeforcesdata structuresimplementation
- Stacking Pancakes1679CodeChef
- Stamina and Tasks1300Codeforcesdpgreedymath
- Stamps 1001631CodeChef
- Star1300Codeforces*specialcombinatorics
- Statistics Construction1666CodeChef
- Steps1300Codeforcesbinary searchimplementation
- Stingy Strings1769CodeChef
- Strange Birthday Party1300Codeforcesbinary searchdpgreedysortings
- Strange Function1789CodeChef
- String Equality1400Codeforcesdpgreedyhashingimplementation
- String Manipulation 1.01400Codeforces*specialbinary searchbrute forcedata structures
- String Modification1400Codeforcesbrute forceconstructive algorithmsimplementationsortings
- String Reverse1792CodeChef
- String Transformation1300Codeforcesgreedystrings
- String Typing1400Codeforcesimplementationstrings
- Strings1769CodeChef