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- Road Improvement2300Codeforcesdptrees
- Road Problem2100Codeforcesgraphs
- Robot Cleaner Revisit2300Codeforcesimplementationmathprobabilities
- Robot on the Board 22300Codeforcesbrute forcedfs and similargraphsimplementation
- Robots in Chefland2505CodeChef
- Robots on a Grid2200Codeforcesdata structuresdfs and similardsugraphs
- Rock Is Push2200Codeforcesbinary searchdp
- Roll the Bar2579CodeChef
- Roses for Alexey2459CodeChef
- Rosetta Problem2100Codeforces*special
- Round Subset2100Codeforcesdpmath
- Row Bombing2429CodeChef
- Rubik's Cube Coloring (hard version)2300Codeforcesbrute forcedpimplementationmath
- Run for beer2200Codeforcesdfs and similarshortest paths
- Runner's Problem2100Codeforcesdpmatricessortings
- Running Over The Bridges2200Codeforcesgreedyimplementationmath
- Sad powers2100Codeforcesbinary searchmathnumber theory
- Safe2200Codeforcesbrute force
- Safe cracking2200Codeforcesbrute forceconstructive algorithms
- Sagheer and Apple Tree2300Codeforcesgamestrees
- Sakurako and Chefir2200Codeforcesdata structuresdfs and similardpgreedy
- Sakurako's Test2100Codeforcesbinary searchbrute forcegreedymath
- Salazar Slytherin's Locket2200Codeforcesbitmasksdp
- Salyg1n and Array (hard version)2200Codeforcesconstructive algorithmsinteractive
- Sand Fortress2100Codeforcesbinary searchconstructive algorithmsmath
- Santa Claus and Tangerines2100Codeforcesbinary searchdata structuresgreedytwo pointers
- Santa Claus and a Palindrome2100Codeforcesconstructive algorithmsdata structuresgreedy
- Santa Clauses and a Soccer Championship2300Codeforcesconstructive algorithmsdfs and similargraphstrees
- Sasha and Array2300Codeforcesdata structuresmathmatrices
- Sasha and Photos2566CodeChef
- Sasha and the Happy Tree Cutting2300Codeforcesbitmasksbrute forcedfs and similardp
- Sasha and the Wedding Binary Search Tree2300Codeforcesbrute forcecombinatoricsdata structuresdfs and similar
- Sausage Maximization2200Codeforcesbitmasksdata structurestrees
- Say Hello2300Codeforcesgeometry
- Scalar Product Tree2527CodeChef
- Scalar Queries2300Codeforcescombinatoricsdata structuresmathsortings
- Scheme2300Codeforcesdfs and similargraphstrees
- School2200Codeforcesdpdsu
- Scooter2300Codeforcesgraphsgreedy
- Score Sum2479CodeChef
- Scoring Pairs2585CodeChef
- Script Generation2300Codeforces
- Searching Rectangles2200Codeforcesbinary searchconstructive algorithmsinteractive
- Searching for a Biclique2414CodeChef
- Seating of Students2200Codeforcesbrute forceconstructive algorithmsmath
- Sebi and the corrupt goverment2476CodeChef
- Secret Mission2421CodeChef
- Sed Passwords2537CodeChef
- Seeding The Pattern2463CodeChef
- Segment Intersections2100Codeforcesbrute forcegreedyimplementationmath
- Segment Sum2300Codeforcesbitmaskscombinatoricsdpmath
- Segment Tree2100Codeforcesdata structuresdsugraphstrees
- Segments2100Codeforcesdata structures
- Selinas the Chefs Falling on the Tree2520CodeChef
- Selling Souvenirs2300Codeforcesbinary searchdpgreedyternary search
- Send Boxes to Alice (Hard Version)2100Codeforcesconstructive algorithmsgreedymathnumber theory
- Send the Fool Further! (medium)2100Codeforcesdptrees
- Separate Them All2425CodeChef
- Sequence2200Codeforcesdpsortings
- Sequence GCD2563CodeChef