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- Masha and two friends1500Codeforcesimplementation
- Mashmokh and Numbers1500Codeforcesconstructive algorithmsnumber theory
- Mashmokh and Tokens1500Codeforcesbinary searchgreedyimplementationmath
- Math1500Codeforcesgreedymathnumber theory
- Mathison and the Dynamo shuffle1920CodeChef
- Matrix1600Codeforcescombinatoricsdata structuresimplementation
- Matrix Again1970CodeChef
- Matrix XOR1864CodeChef
- Matrix and Shifts1600Codeforcesbrute forceconstructive algorithmsgreedyimplementation
- Max Size1896CodeChef
- Max Sum OR (Easy Version)1500Codeforcesbitmasksconstructive algorithmsdivide and conquergreedy
- Maximal Intersection1600Codeforcesgreedymathsortings
- Maximise Islands1932CodeChef
- Maximise the bridges1972CodeChef
- Maximize an Expression1809CodeChef
- Maximize the Root1500Codeforcesbinary searchdfs and similardpgreedy
- Maximum AND1908CodeChef
- Maximum Absurdity1500Codeforcesdata structuresdpimplementation
- Maximum Candies1896CodeChef
- Maximum Crossings (Hard Version)1500Codeforcesdata structuresdivide and conquersortings
- Maximum Product Strikes Back1600Codeforcesbrute forceimplementationmathtwo pointers
- Maximum Set1600Codeforcesbinary searchmath
- Maximum Smaller1984CodeChef
- Maximum Subarray Sum1500Codeforcesbinary searchconstructive algorithmsdpimplementation
- Maximum Submatrix 21600Codeforcesdata structuresdpimplementationsortings
- Maximum Subrectangle1600Codeforcesbinary searchimplementationtwo pointers
- Maximum Sum Permutation1873CodeChef
- Maximum Sum of Products1600Codeforcesbrute forcedpimplementationmath
- Maximum Sum on Even Positions1600Codeforcesdivide and conquerdpgreedyimplementation
- Maximum width1500Codeforcesbinary searchdata structuresdpgreedy
- Maze1600Codeforcesdfs and similar
- Mean Requests1500Codeforces*specialimplementation
- Meaningless Operations1500Codeforcesconstructive algorithmsmathnumber theory
- Median1500Codeforcesgreedymathsortings
- Median Partition1500Codeforcesdpmath
- Median Splits1600Codeforcesbinary searchgreedyimplementationsortings
- Meeting on the Line1600Codeforcesbinary searchgeometrygreedyimplementation
- Memory Manager1600Codeforcesimplementation
- Memory and De-Evolution1600Codeforcesgreedymath
- Menorah1600Codeforcesbrute forcegraphsgreedymath
- Mental Monumental (Easy Version)1500Codeforcesbinary searchdata structuresgreedymath
- Mentors1500Codeforcesbinary searchdata structuresimplementation
- Merge Equals1600Codeforcesdata structuresimplementation
- Merged LIS1978CodeChef
- Mex Array1965CodeChef
- Mex Tree (Min)1862CodeChef
- Mexification1500Codeforcesbrute forceimplementationmath
- Mike and Shortcuts1600Codeforcesdfs and similargraphsgreedyshortest paths
- Mike and Stamps1903CodeChef
- Mike and Task Packages1879CodeChef
- Milena and Admirer1500Codeforcesgreedymath
- Military Problem1600Codeforcesdfs and similargraphstrees
- Military Trainings1600Codeforces
- Milking cows1600Codeforcesdata structuresgreedy
- Min Cost String1600Codeforcesbrute forceconstructive algorithmsgraphsgreedy
- Min Max MEX1500Codeforcesbinary searchbrute forcegreedy
- Min Max Sort1500Codeforcesbinary searchbrute forcegreedymath
- Min Modular Subarray1988CodeChef
- Min Steps1953CodeChef
- Min-Max Queries1868CodeChef