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- Recover the String1900Codeforcesconstructive algorithmsgreedyimplementationmath
- Rectangle Puzzle2000Codeforcesgeometry
- Red Green Grids2319CodeChef
- Red-Green Towers2000Codeforcesdp
- Reduce string2297CodeChef
- Regular Bridge1900Codeforcesconstructive algorithmsgraphsimplementation
- Relay Race2000Codeforcesdp
- Remove Balance2231CodeChef
- Remove Directed Edges2000Codeforcesdfs and similardpgraphs
- Remove digits1900Codeforces*special
- Renting Spare Oven Time2313CodeChef
- Repetitions Decoding2000Codeforcesconstructive algorithmsimplementationsortings
- Replace With Product2000Codeforcesbrute forcegreedymath
- Replace by MEX1900Codeforcesbrute forceconstructive algorithmssortings
- Replace the Numbers1900Codeforcesconstructive algorithmsdata structuresdsuimplementation
- Replacing Game2307CodeChef
- Rescheduling the Exam1900Codeforcesbinary searchdata structuresgreedyimplementation
- Reserved Reversals1900Codeforcesconstructive algorithmsdpgreedymath
- Reset K Edges1900Codeforcesbinary searchdata structuresdfs and similargraphs
- Resourceful Caterpillar Sequence1900Codeforcesdfs and similardpgamesgraphs
- Restoration of string2000Codeforcesconstructive algorithmsgraphsimplementation
- Restore Cube 2000Codeforcesbrute forcegeometry
- Restore Permutation1900Codeforcesbinary searchdata structuresgreedyimplementation
- Restore the Permutation1900Codeforcesbinary searchconstructive algorithmsdata structuresgreedy
- Restoring Increasing Sequence2000Codeforcesbinary searchbrute forcegreedyimplementation
- Restricted Removals2333CodeChef
- Restructuring Company1900Codeforcesdata structuresdsu
- Reverse2000Codeforcesbitmasksconstructive algorithmsdfs and similarimplementation
- Reverse Costs2330CodeChef
- Reverse Sort Sum1900Codeforcesconstructive algorithmsdata structuresgreedyimplementation
- Rich Substrings2211CodeChef
- Riding in a Lift1900Codeforcescombinatoricsdp
- Rigged Bracket Sequence2000Codeforcescombinatoricsdpgreedy
- Right Expansion Of The Mind2000Codeforcesmath
- River Locks1900Codeforcesbinary searchdpgreedymath
- Road to Post Office1900Codeforcesmath
- Roads in Berland1900Codeforcesgraphsshortest paths
- Roads not only in Berland1900Codeforcesdsugraphstrees
- Robin Hood2000Codeforcesbinary searchgreedy
- Robin Hood Archery1900Codeforcesdata structuresdivide and conquergreedyhashing
- Robo-Footballer2000Codeforcesbinary searchgeometry
- Robot Collisions2000Codeforcesdata structuresgreedyimplementationsortings
- Robot Detector2307CodeChef
- Robot Queries1900Codeforcesbinary searchdata structuresdpimplementation
- Robot in a Hallway2000Codeforcesdata structuresdpgreedyimplementation
- Rohith and Circles2315CodeChef
- Roma and Poker2000Codeforcesdpgraphs
- Roman Digits2000Codeforcesbrute forcecombinatoricsdpgreedy
- Roman and Numbers2000Codeforcesbitmasksbrute forcecombinatoricsdp
- Root of the Problem2247CodeChef
- Rooter's Song1900Codeforcesconstructive algorithmsdata structuresgeometryimplementation
- Ross goes for Shopping2396CodeChef
- Rotate Columns (easy version)2000Codeforcesbitmasksbrute forcedpgreedy
- Rudolf and CodeVid-231900Codeforcesbitmasksdpgraphsgreedy
- Rudolf and Subway2000Codeforcesconstructive algorithmsdfs and similargraphsshortest paths
- Run Direction2379CodeChef
- Running Track2000Codeforcesdpgreedystringstrees
- Rush Hour2382CodeChef
- Russian Roulette1900Codeforcesconstructive algorithmsgreedy
- S-T Mincut2383CodeChef