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- Minimum OR Path2502CodeChef
- Minimum Popping2463CodeChef
- Minimum Possible LCM2200Codeforcesbrute forcegreedymathnumber theory
- Minimum Replacement2535CodeChef
- Minimum spanning tree for each edge2100Codeforcesdata structuresdfs and similardsugraphs
- Mininum XOR over Tree2585CodeChef
- Minion Circle2437CodeChef
- Mischievous Shooter2200Codeforcesbrute forcedata structuresdivide and conquerdp
- Mishka and Interesting sum2100Codeforcesdata structures
- Misinterpretation 22405CodeChef
- Missing Separators2200Codeforcesdpsortingsstring suffix structuresstrings
- Mister B and Boring Game2200Codeforcesgamesgreedy
- Mocha and Stars2200Codeforcescombinatoricsdpfftmath
- Modular Sequence2300Codeforcesbrute forceconstructive algorithmsdpgraphs
- Modular Sorting2100Codeforcesbrute forcedata structuresgreedymath
- Moment of Bloom2200Codeforcesconstructive algorithmsdfs and similargraph matchingsgraphs
- Money Transfers2100Codeforcesconstructive algorithmsdata structuresgreedysortings
- Monocarp and the Set2100Codeforcescombinatoricsdata structuresmath
- Monotone Subsequence2100Codeforcesconstructive algorithmsgraphsgreedyinteractive
- Monster2300Codeforcesbinary searchbrute forceconstructive algorithmsgreedy
- Monster Invaders2300Codeforcesdpgreedyimplementation
- Monsters2100Codeforcesbrute forcedata structuresdfs and similardsu
- Monsters (hard version)2200Codeforcesdata structuresgreedy
- Monsters and Potions2300Codeforcesbrute forcedpgreedyimplementation
- Moon Craters2100Codeforcesdpsortings
- More Reclamation2100Codeforcesgames
- More Wrong2100Codeforcesdivide and conquerinteractive
- Most Distant Points2471CodeChef
- Motorbike Racing2598CodeChef
- Moving Platforms2300Codeforcesgraphsmathnumber theoryshortest paths
- Moving between Floors2562CodeChef
- Moving to the Capital2100Codeforcesdfs and similardpgraphsshortest paths
- Mr. Kitayuta's Technology2200Codeforcesdfs and similar
- Multidimensional Queries2300Codeforcesbitmasksdata structures
- Multiple Change Sum2589CodeChef
- Multiples and Power Differences2200Codeforcesconstructive algorithmsgraphsmathnumber theory
- Multiplicative Arrays2200Codeforcescombinatoricsdpnumber theory
- Multitest Generator2300Codeforcesbrute forcedp
- Mushroom Gnomes - 22200Codeforcesbinary searchdata structuresprobabilitiessortings
- Mushroom Strife2100Codeforcesbrute forcedfs and similar
- Music in Car2200Codeforcesdata structuresgreedytwo pointers
- Mysterious Code2100Codeforcesdpstrings
- Mysterious language again, seriously?2200Codeforces*special
- Mystery Tree2591CodeChef
- N-MEX (Constructive Version)2100Codeforcesconstructive algorithmsgreedy
- Nasty Queries2486CodeChef
- Nastya Hasn't Written a Legend2200Codeforcesbinary searchdata structures
- Nastya and a Game2100Codeforcesbrute forceimplementationmath
- Natasha, Sasha and the Prefix Sums2300Codeforcescombinatoricsdpmathnumber theory
- National Property2100Codeforces2-satdfs and similargraphsimplementation
- Nature Reserve2200Codeforcesbinary searchgeometryternary search
- Nauuo and Pictures (easy version)2300Codeforcesdpprobabilities
- Nearest Beautiful Number (hard version)2100Codeforcesbitmasksbrute forceconstructive algorithmsdfs and similar
- Nearest vectors2300Codeforcesgeometrysortings
- Needle in a Numstack2200Codeforcesbinary searchbrute forceimplementationinteractive
- Neko and Aki's Prank2100Codeforcesdpgreedytrees
- Network Safety2200Codeforcesdfs and similardsugraphsmath
- Neural Network Problem2100Codeforces*specialbinary searchgreedy
- New Game Plus!2200Codeforcesconstructive algorithmsgreedymath
- New Game with a Chess Piece2300Codeforcesgames