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- Looksery Party2300Codeforcesconstructive algorithmsdfs and similargraphsgreedy
- Lost Array2300Codeforcesgraphsgreedyinteractiveshortest paths
- Lost Graph2446CodeChef
- Love Triangles2200Codeforcesdfs and similardsugraphs
- Lovely Matrix2200Codeforcesdfs and similargraphsgreedysortings
- Luck is in Numbers2200Codeforcesgreedy
- Lucky Fives2476CodeChef
- Lucky Number Representation2200Codeforcesconstructive algorithmsdfs and similardp
- Lucky Subsequence2100Codeforcescombinatoricsdpmath
- Lucky Tickets2200Codeforcesbinary searchdata structuressortingstwo pointers
- Lucy and the Flowers2517CodeChef
- Lunar New Year and Red Envelopes2100Codeforcesdata structuresdp
- LuoTianyi and the Floating Islands (Hard Version)2300Codeforcescombinatoricsdfs and similarmathprobabilities
- MEX QUERIES 2463CodeChef
- MEX Queries2300Codeforcesbinary searchdata structurestrees
- MEX Tree2545CodeChef
- MEX Variation2554CodeChef
- MEX of LCM2300Codeforcesbinary searchdata structuresimplementationmath
- MEX of XOR2595CodeChef
- MEX vs DIFF2100Codeforcesbinary searchbrute forceconstructive algorithmsdata structures
- MEXimize the Score2200Codeforcescombinatoricsdata structuresdpgreedy
- MST Unification2100Codeforcesbinary searchdsugraphsgreedy
- Machine Gun2468CodeChef
- Madoka and The Best University2200Codeforcesmathnumber theory
- Magic Gems2100Codeforcesdpmathmatrices
- Magic Hull2590CodeChef
- Magic Numbers2200Codeforcesdp
- Magic Palindrome2495CodeChef
- Magic Squares2100Codeforces
- Magic Stones2200Codeforcesconstructive algorithmsmathsortings
- Magic Trick2100Codeforcescombinatoricsmathprobabilities
- Magic Triples (Hard Version)2200Codeforcesbrute forcedata structuresmathnumber theory
- Magical Modulo2471CodeChef
- Mahmoud and Ehab and the function2100Codeforcesbinary searchdata structuressortings
- Mahmoud and a xor trip2100Codeforcesbitmasksconstructive algorithmsdata structuresdfs and similar
- Main Sequence2100Codeforcesgreedyimplementation
- Make It Equal2100Codeforcesbinary searchbrute forcegreedymath
- Make It Increasing2200Codeforcesbinary searchconstructive algorithmsdata structuresdp
- Make It Special2501CodeChef
- Make a Tree2478CodeChef
- Make array great again2551CodeChef
- Make it Zero2100Codeforcesconstructive algorithmsgreedymath
- Make k Equal2200Codeforcesgreedy
- Makoto and a Blackboard2200Codeforcesdpmathnumber theoryprobabilities
- Marbles2200Codeforcesbitmasksdp
- Mark and Professor Koro2300Codeforcesbinary searchbitmasksbrute forcecombinatorics
- Marmots (easy)2100Codeforcesmath
- Marmots (medium)2200Codeforcesmath
- Martial Arts Tournament2100Codeforcesbinary searchbrute forcegreedymath
- Martian Strings2300Codeforcesstring suffix structuresstrings
- Masha and Minions2466CodeChef
- Mashmokh and Reverse Operation2100Codeforcescombinatoricsdivide and conquer
- Mashmokh and Water Tanks2300Codeforcesbinary searchdata structuresgreedytrees
- Match & Catch2200Codeforcesdpstring suffix structuresstrings
- Matchable Permutations2407CodeChef
- Matching Names2300Codeforcesdfs and similarstringstrees
- Math2200Codeforces*specialmath
- Math Test2200Codeforcesbitmasksbrute forcegreedy
- Matrix Modulo2567CodeChef
- Matrix Pain2597CodeChef