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- Marks900Codeforcesimplementation
- Mashmokh and Lights900Codeforcesimplementation
- Matrix Game1279CodeChef
- Matrix Stabilization1000Codeforcesbrute forcedata structuresgreedysortings
- Max count of 11381CodeChef
- Max power1282CodeChef
- Maxim and Biology1000Codeforcesbrute forcestrings
- Maximal Continuous Rest900Codeforcesimplementation
- Maximise Function1301CodeChef
- Maximise Score1390CodeChef
- Maximise Sum1372CodeChef
- Maximise XOR1229CodeChef
- Maximum Control (easy)1000Codeforcesimplementation
- Maximum Cost Deletion1000Codeforcesgreedymath
- Maximum Cost Permutation1000Codeforcesconstructive algorithmsgreedy
- Maximum Deliciousness1263CodeChef
- Maximum Distance Permutations1387CodeChef
- Maximum OR Minimum1313CodeChef
- Maximum Pairwise Modular Sum1370CodeChef
- Maximum Remaining1221CodeChef
- Maximum Score 1202CodeChef
- Maximum Strength1000Codeforcesgreedymath
- Maximums900Codeforcesimplementationmath
- Mean and Median1371CodeChef
- Metro900Codeforcesgraphs
- Mex Master900Codeforcesconstructive algorithmsgreedy
- Middle of the Contest1000Codeforcesimplementation
- Mike and palindrome1000Codeforcesbrute forceconstructive algorithmsstrings
- Minimise LCS1367CodeChef
- Minimise Sum1000Codeforcesgreedy
- Minimize Equal Sum Subarrays1000Codeforcesconstructive algorithmsmathnumber theory
- Minimize Inversions900Codeforcesconstructive algorithmsdata structuresgreedyimplementation
- Minimum And Maximum I1288CodeChef
- Minimum Deletions1267CodeChef
- Minimum Difficulty900Codeforcesbrute forceimplementationmath
- Minimum Extraction1000Codeforcesbrute forcesortings
- Minimum Good Permutation1315CodeChef
- Minimum Integer1000Codeforcesmath
- Minimum LCM1000Codeforcesmathnumber theory
- Minimum Maximum1392CodeChef
- Minimum Sum1315CodeChef
- Minimum Types1394CodeChef
- Minimum distance between 1s1335CodeChef
- Minimum or Maximum1233CodeChef
- Mislove Has Lost an Array900Codeforcesgreedymath
- Missing Sums1374CodeChef
- Mister B and Book Reading900Codeforcesimplementation
- Mocha and Math900Codeforcesbitmasksconstructive algorithmsmath
- Mocha and Red and Blue900Codeforcesdpgreedy
- Mode of Frequencies1234CodeChef
- Modular Exponentiation900Codeforcesimplementationmath
- Modular Mirrors1373CodeChef
- Monsters1000Codeforcesgreedymathsortings
- Monsters (easy version)1000Codeforcesbrute forcegreedy
- Move Brackets1000Codeforcesgreedystrings
- Move to the End1000Codeforcesbrute forcedata structuresdpgreedy
- Multiple Construction1000Codeforcesconstructive algorithms
- Multiplication Table1000Codeforcesimplementationnumber theory
- Multiply by 2, divide by 6900Codeforcesmath
- Mystic Permutation900Codeforcesdata structuresgreedy