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- Sardar and GCD2190CodeChef
- Sasha and One More Name1800Codeforcesconstructive algorithmshashingstrings
- Save Energy!1700Codeforcesbinary searchimplementationmath
- Scammy Game Ad1800Codeforcesdpgreedyimplementation
- Schedule1700Codeforcesimplementation
- School Marks1700Codeforcesgreedyimplementation
- Scrambled1700Codeforces*specialimplementation
- Scrambled Scrabble1700Codeforcesbrute forcegreedy
- Script Generation1800Codeforces
- Se7en2041CodeChef
- Sea Battle1700Codeforcesconstructive algorithmsgreedymath
- Searching Local Minimum1700Codeforcesbinary searchinteractiveternary search
- Second Largest Element2071CodeChef
- Second MEX2188CodeChef
- Secret Machine Mania2128CodeChef
- Segment Three2089CodeChef
- Selling a Menagerie1800Codeforcesdfs and similardsugraphsimplementation
- Send Boxes to Alice (Easy Version)1800Codeforcesconstructive algorithmsgreedymathnumber theory
- Sequence Formatting1700Codeforcesimplementationstrings
- Sequence of points1800Codeforcesgeometryimplementationmath
- Sereja and Data Structures 2149CodeChef
- Sereja and Salesman2175CodeChef
- Sereja and Two Lines2181CodeChef
- Serval and Parenthesis Sequence1700Codeforcesgreedystrings
- Set Major (Prefix)2027CodeChef
- Set To Max (Hard Version)1800Codeforcesconstructive algorithmsdata structuresdivide and conquergreedy
- Set To Median2180CodeChef
- Sets1700Codeforcesconstructive algorithmshashingimplementation
- Shaass and Bookshelf1700Codeforcesdpgreedy
- Shave Beaver!1700Codeforcesimplementation
- Sheikh (Easy version)1800Codeforcesbinary searchbitmasksgreedytwo pointers
- Sherlock and the Ugly Flower2121CodeChef
- Shift The String2167CodeChef
- Shift and Reverse1800Codeforcesgreedysortings
- Shifting String1700Codeforcesgraphsmathnumber theorystrings
- Shinju and the Lost Permutation1700Codeforcesconstructive algorithmsmath
- Shohag Loves GCD1700Codeforcesconstructive algorithmsgreedymathnumber theory
- Shohag Loves XOR (Hard Version)1800Codeforcesbitmasksbrute forcemathnumber theory
- Shooting Gallery1800Codeforcesdpprobabilities
- Short Task1700Codeforcesbrute forcedpmathnumber theory
- Shortest Statement Ever1800Codeforcesbitmasksconstructive algorithmsdpgreedy
- Shortest and Longest LIS1800Codeforcesconstructive algorithmsgraphsgreedytwo pointers
- Shovel Sale1800Codeforcesconstructive algorithmsmath
- Shurikens1700Codeforcesdata structuresgreedyimplementation
- Siga ta Kymata1700Codeforcesconstructive algorithmsgreedyimplementationmath
- Signature2138CodeChef
- Similar Arrays1800Codeforcesconstructive algorithms
- Simons and Beating Peaks1700Codeforcesdata structuresdivide and conquerdpgreedy
- Simple Permutation1700Codeforcesconstructive algorithmsnumber theory
- Simple Subset1800Codeforcesconstructive algorithmsgreedynumber theory
- Simple Sum2089CodeChef
- Singers' Tour1700Codeforcesconstructive algorithmsmath
- Skibidus and Capping1700Codeforcescombinatoricsmathnumber theory
- Skibidus and Slay1700Codeforcesdata structuresdfs and similargraphsgreedy
- Skiing2047CodeChef
- Skipping1700Codeforcesbinary searchdpgraphsshortest paths
- SlavicG's Favorite Problem1700Codeforcesbitmasksdfs and similargraphs
- Sleeping Schedule1700Codeforcesdpimplementation
- Slime1800Codeforcesdpgreedyimplementation
- Slime Escape1800Codeforcesdata structuresdpgreedytwo pointers