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- Different Rules1700Codeforcesconstructive algorithmsgreedyimplementationmath
- Different Subarrays Rearrange2145CodeChef
- Digits Sequence (Hard Edition)1800Codeforcesbinary searchdivide and conquerimplementation
- Dima and Hares1800Codeforcesdpgreedy
- Dima and Lisa1800Codeforcesbrute forcemathnumber theory
- Dining Hall1700Codeforcesdata structuresgreedyimplementationsortings
- Dirty Deeds Done Dirt Cheap1800Codeforcesgreedysortings
- Discounts1700Codeforcesconstructive algorithmsgreedysortings
- Disks1800Codeforcesdfs and similargeometrygraph matchingsgraphs
- Disposition1700Codeforcesconstructive algorithmsmath
- Distance in Tree1800Codeforcesdfs and similardptrees
- Distances2134CodeChef
- Distinct Numbers2015CodeChef
- Distinguish four 2-qubit states - 21700Codeforces*special
- Distinguish zero state and plus state with minimum error1700Codeforces*special
- Distinguish zero state and plus state without errors1800Codeforces*special
- Divide and conquer2043CodeChef
- Dividing Machine2069CodeChef
- Dividing into Groups2183CodeChef
- Divisibility Game1700Codeforcesbrute forcegamesgreedynumber theory
- Divisible by Twenty-Five1800Codeforcesbrute forcedfs and similardp
- Division Versus Addition1700Codeforcesgamesgreedymath
- Doctor1800Codeforcesbinary searchmathsortings
- Dome1800Codeforces*special
- Domino (easy version)1700Codeforcesconstructive algorithmsmath
- Don't Blame Me1700Codeforcesbitmaskscombinatoricsdpmath
- Doremy's Connecting Plan1700Codeforcesconstructive algorithmsgreedymathsortings
- Double Burgers2072CodeChef
- Double Lexicographically Minimum1700Codeforcesgreedystrings
- Dreamoon Likes Coloring1800Codeforcesconstructive algorithmsgreedyimplementationmath
- Dreamoon Likes Sequences1700Codeforcesbitmaskscombinatoricsmath
- Driving Test1800Codeforcesdata structuresdpgreedy
- Drunken Maze1700Codeforcesbrute forcedfs and similargraphsshortest paths
- Dual Nim2031CodeChef
- Dungeons and Candies1800Codeforcesdsugraphsgreedytrees
- Easy Chess1700Codeforcesconstructive algorithms
- Easy Problem1800Codeforcesdp
- Echo2026CodeChef
- Edge Deletion1800Codeforcesgraphsgreedyshortest paths
- Edge Weight Assignment1800Codeforcesbitmasksconstructive algorithmsdfs and similargreedy
- Effective Sets2078CodeChef
- Efim and Strange Grade1700Codeforcesdpimplementationmath
- Ehab the Xorcist1700Codeforcesbitmasksconstructive algorithmsgreedynumber theory
- Elections1700Codeforcesbrute forcegreedy
- Elections1700Codeforcesgreedy
- Elections in Saransk (easy version)1700Codeforcesnumber theory
- Embassy Queue1800Codeforcesdata structuresgreedy
- Empire Business 2042CodeChef
- Enlarge GCD1800Codeforcesnumber theory
- Epidemic in Monstropolis1800Codeforcesconstructive algorithmsdpgreedytwo pointers
- Equal Multisets (Hard Version)1800Codeforcesconstructive algorithmsdsugreedy
- Equal XOR Segments1800Codeforcesbinary searchdata structures
- Equalization2162CodeChef
- Equate Multisets1700Codeforcesconstructive algorithmsdata structuresgreedymath
- Equivalent Numbers2087CodeChef
- Equivalent Strings1700Codeforcesdivide and conquerhashingsortingsstrings
- Escape The Maze (easy version)1700Codeforcesdfs and similargreedyshortest pathstrees
- Eternal Victory1800Codeforcesdfs and similargraphsgreedyshortest paths
- Eugene and an array1700Codeforcesbinary searchdata structuresimplementationtwo pointers
- Even String1700Codeforcesbrute forcecombinatoricsdpmath