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- Maximum Permutation3500Codeforcesconstructive algorithms
- Maximum Polygon3100Codeforcesbrute forcedata structuresgreedyimplementation
- Maximum Product?3500Codeforcesbrute forcecombinatoricsdpgreedy
- Maximum Score Subarray3087CodeChef
- Maximum Special Sum3043CodeChef
- Maximum Sub-rectangle in Matrix3442CodeChef
- Maximum Tree Jumps3395CodeChef
- Maximum Tree Path3053CodeChef
- Maximum Value from Binary strings3015CodeChef
- Maximum XOR2963CodeChef
- May Holidays2900Codeforcesdata structurestrees
- Maze3500Codeforcestrees
- Maze3034CodeChef
- Median Deletion3500Codeforces
- Median Mountain Range3300Codeforcesdata structures
- Median Pairs3155CodeChef
- Median Permutation3200Codeforcescombinatorics
- Median Queries3000Codeforcesconstructive algorithmsinteractiveprobabilities
- Median Subsets (Counting)3081CodeChef
- Median Subsets (Prefix)2920CodeChef
- Meet over Grid2958CodeChef
- Mega mu - 13417CodeChef
- Mergesort Strikes Back3200Codeforcesmathprobabilities
- Message Spread3500Codeforcesbitmasksbrute forcecombinatoricsdp
- Messages on a Tree3300Codeforces
- Meta-universe2900Codeforcesdata structures
- Mex Chef3336CodeChef
- Mex On Subtrees3121CodeChef
- Mex Pairs3304CodeChef
- Mex Path3325CodeChef
- Mex Permutation (Easy)3181CodeChef
- Mex Permutation (Hard)3282CodeChef
- Mex Segments2963CodeChef
- Mex Tree2800Codeforcesbrute forcedptrees
- Michael and Hotel3000Codeforcesbinary searchinteractivetrees
- Mike and Friends2800Codeforcesdata structuresstring suffix structuresstringstrees
- Mike and code of a permutation3000Codeforcesconstructive algorithmsdata structuresgraphssortings
- Milutin's Plums2800Codeforcesinteractive
- Min Cost Permutation (Hard Version)2800Codeforcesbinary searchconstructive algorithmsdata structuresgreedy
- Min Max Paths3106CodeChef
- Min-Max Path2936CodeChef
- Min-Sum-Max3500Codeforcesconstructive algorithmsdpgreedy
- Mind Bloom3500Codeforcesdp
- Minecraft Series3500Codeforcesbrute forcetwo pointers
- Minesweeper3457CodeChef
- Mini Metro3400Codeforcesdp
- Minibuses on Venus (hard version)2800Codeforcesbrute forcecombinatoricsdpmath
- Minimal Inversions3336CodeChef
- Minimal String Xoration2800Codeforcesbitmasksdata structuresdivide and conquergreedy
- Minimal Subset Difference3200Codeforcesdp
- Minimise Cost3500Codeforcesbinary searchdpgreedysortings
- Minimization Game3251CodeChef
- Minimize Inversions Number3500Codeforcesdata structuresgreedymathsortings
- Minimize Tree GCD2974CodeChef
- Minimize Tree GCD (Hard)3298CodeChef
- Minimize the Difference3480CodeChef
- Minimize the Sum2944CodeChef
- Minimum Diameter3100Codeforcesbinary searchbrute force
- Minimum Difference3100Codeforcesdata structureshashingsortingstwo pointers
- Minimum Divisibility Set3204CodeChef