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- Diophantine equation1500Codeforces*special
- Discrete Acceleration1500Codeforcesbinary searchdpimplementationmath
- Dish Owner1848CodeChef
- Distinct Characters Queries1600Codeforcesdata structures
- Distinct Neighbours 1997CodeChef
- Distinct Numbers1912CodeChef
- Distinct Representations1922CodeChef
- Distinguish Bell states1600Codeforces*special
- Distinguish GHZ state and W state1600Codeforces*special
- Distinguish four 2-qubit states1600Codeforces*special
- Divan and bitwise operations1500Codeforcesbitmaskscombinatoricsconstructive algorithmsdp
- Divide Candies1600Codeforcesmathnumber theory
- Divide The Students1500Codeforcesbinary searchgreedymath
- Divide and Summarize1600Codeforcesbinary searchbrute forcedata structuresdivide and conquer
- Divide the Tangerine1840CodeChef
- Divisibility1600Codeforcesmath
- Divisibility by Eight1500Codeforcesbrute forcedpmath
- Divisible Numbers (easy version)1500Codeforcesbrute forcemathnumber theory
- Divisible Pairs1835CodeChef
- Divisible by Seven1600Codeforcesmathnumber theory
- Division1500Codeforcesbrute forcemathnumber theory
- Division 1923CodeChef
- Division and Union1500Codeforcessortings
- Division into Teams1500Codeforcesgreedymathsortings
- Divisive Battle1500Codeforcesgamesgreedymathnumber theory
- Divisors Array (Easy Version)1907CodeChef
- Divisors and Reciprocals1848CodeChef
- Do You Love Your Hero and His Two-Hit Multi-Target Attacks?1500Codeforcesbinary searchbrute forceconstructive algorithmsdp
- Do you want a date?1500Codeforcesimplementationmathsortings
- Doof fires Brackets1983CodeChef
- Doom Bakes Cakes1821CodeChef
- Door Frames1600Codeforcesgreedyimplementation
- Dora and C++1500Codeforcesmathnumber theory
- Doremy's IQ1600Codeforcesbinary searchconstructive algorithmsgreedyimplementation
- Double Trouble1853CodeChef
- Double or Append 1812CodeChef
- Dr Geros lab1889CodeChef
- Draughts1944CodeChef
- Dreamoon and Sums1600Codeforcesmath
- Drink Slush1884CodeChef
- Dubious Cyrpto1500Codeforcesbinary searchbrute forcemathnumber theory
- Duff and Weight Lifting1500Codeforcesgreedy
- Dynasty Puzzles1500Codeforcesdp
- EKG1600Codeforcesdfs and similardp
- EKG1500Codeforcesbrute forcedfs and similar
- Eastern Exhibition1500Codeforcesbinary searchgeometryshortest pathssortings
- Easy Tape Programming1500Codeforcesbrute forceimplementation
- Eat the Chip1600Codeforcesbrute forcegamesgreedymath
- Edgy Trees1500Codeforcesdfs and similardsugraphsmath
- Effects of Anti Pimples1500Codeforcescombinatoricsnumber theorysortings
- Ehab and Path-etic MEXs1500Codeforcesconstructive algorithmsdfs and similargreedytrees
- Ehab and Prefix MEXs1600Codeforcesbrute forceconstructive algorithmsgreedy
- Ela and Crickets1500Codeforcesconstructive algorithmsgamesimplementationmath
- Elections1600Codeforcesdata structuresgreedyimplementationmath
- Electrification1600Codeforcesbinary searchbrute forcegreedy
- Elimination1500Codeforcesdpimplementationmath
- Empty Triangle1600Codeforcesgeometryinteractiveprobabilities
- Empty the String1946CodeChef
- Encrypting Messages1500Codeforcesdata structures
- Enduring Exodus1600Codeforcesbinary searchtwo pointers