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- Subtree Coloring2714CodeChef
- Subtree Removal Game2500Codeforcesbinary searchgamestrees
- Subtree XOR Counting2722CodeChef
- Subway Ride2774CodeChef
- Sum Balance2400Codeforcesbitmasksdfs and similardpgraphs
- Sum Operations (Easy)2719CodeChef
- Sum and OR2723CodeChef
- Sum of Cubes2791CodeChef
- Sum of Digits of Sums2400Codeforces*specialbinary searchdata structures
- Sum of Empty the String2819CodeChef
- Sum of LCA2825CodeChef
- Sum of Matchings2600Codeforcesbrute forcecombinatoricsconstructive algorithmsdfs and similar
- Sum of Prefix Sums2700Codeforcesdata structuresdivide and conquergeometrytrees
- Sum of Xors2611CodeChef
- Sum of distances2880CodeChef
- Sum on Tree2814CodeChef
- Sum the Fibonacci2600Codeforcesbitmasksdivide and conquerdpfft
- Summer Earnings2500Codeforcesbinary searchbitmasksbrute forcegeometry
- Summer Practice Report2500Codeforcesdpgreedy
- Summer Reading2500Codeforcesdpgreedy
- Summing the values2702CodeChef
- Summoning Minions2500Codeforcesconstructive algorithmsdpflowsgraph matchings
- Super Jaber2600Codeforcesdfs and similargraphsimplementationshortest paths
- SuperFunction2762CodeChef
- Superb Graphs2600Codeforces2-satgraphs
- Superhero's Job2600Codeforcesdfs and similardphashingmath
- Superior Periodic Subarrays2400Codeforcesnumber theory
- Superstitions Inspection2700Codeforces*special
- Surgical Strikes2629CodeChef
- Survival of the Weakest (easy version)2600Codeforcesbinary searchbrute forceimplementationmath
- Swag Subsets2803CodeChef
- Swap Shift2714CodeChef
- Swap and Maximum Block2500Codeforcesbitmasksdata structuresdfs and similardivide and conquer
- Swap and Take2600Codeforcesdpgreedy
- Swapping Problem2500Codeforcesbrute forceconstructive algorithmsdata structuressortings
- Swedish Heroes2700Codeforcesbrute forcedpimplementation
- Sweetest Candy 2668CodeChef
- T-shirt2700Codeforcesdpgreedyprobabilities
- TV Game2400Codeforcesdp
- Tachibana Kanade's Tofu2500Codeforcesdp
- Tanks2400Codeforcesdpgreedyimplementation
- Tanya and Password2500Codeforcesdfs and similargraphs
- Tasty Cookie2700Codeforcesbinary searchconstructive algorithmsgreedyimplementation
- Tasty Dishes2668CodeChef
- Tavas and Pashmaks2600Codeforcesgeometrymath
- Taxi Driver2734CodeChef
- Team Divisions2627CodeChef
- Team Players2700Codeforcescombinatorics
- Team Sigma and Fibonacci2868CodeChef
- Team Trees2836CodeChef
- Team Work2400Codeforcescombinatoricsdpmath
- Team-Building2500Codeforcesdata structuresdfs and similardsugraphs
- Teleporters2600Codeforcesbinary searchgreedy
- Tennis Rackets2700Codeforcesbrute forcegeometry
- Tensor2600Codeforcesconstructive algorithmsgraphsinteractive
- Tenzing and Tree2500Codeforcesdfs and similargreedyshortest pathssortings
- Terrible vectors2644CodeChef
- Testing2600Codeforces
- Tetragon2600Codeforcesgeometrymath
- Text Editor2500Codeforcesbrute forcedpgreedystrings