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- Guess The Tree1500Codeforcesbinary searchbrute forcedfs and similardivide and conquer
- Guess the K-th Zero (Easy version)1600Codeforcesbinary searchinteractive
- Guess the number1987CodeChef
- Guessing the Greatest (easy version)1600Codeforcesbinary searchinteractive
- Guest Student1500Codeforcesmath
- Hacker, pack your bags!1600Codeforcesbinary searchgreedyimplementationsortings
- Hacking Numbers (Easy Version)1500Codeforcesbitmasksconstructive algorithmsinteractivemath
- Halloween Array1817CodeChef
- Hamburgers1600Codeforcesbinary searchbrute force
- Hamming Distance Sum1500Codeforcescombinatoricsstrings
- Hamsters and Tigers1600Codeforcestwo pointers
- Happy Birthday1500Codeforcesmath
- Hard Process1600Codeforcesbinary searchdptwo pointers
- Hard problem1600Codeforcesdpstrings
- Hashing Trees1500Codeforcesconstructive algorithmstrees
- Healthy dinner party1841CodeChef
- Heap Operations1600Codeforcesconstructive algorithmsdata structuresgreedy
- Heaters1500Codeforcesgreedytwo pointers
- Heidi and the Turing Test (Easy)1600Codeforcesimplementation
- Help Farmer1600Codeforcesbrute forcemath
- Hidden Knowledge of the Ancients1500Codeforcesdata structurestwo pointers
- Hidden Word1600Codeforcesbrute forceconstructive algorithmsimplementationstrings
- Hide and Seek1500Codeforcesgraphs
- Hierarchy1500Codeforcesdfs and similardsugreedyshortest paths
- High Score (Easy Version)1977CodeChef
- Highway Crossing1884CodeChef
- Hilbert's Hotel1600Codeforcesmathnumber theorysortings
- History1500Codeforcessortings
- Hits Different1600Codeforcesdata structuresdpimplementationmath
- Hobbits' Party1600Codeforcesconstructive algorithmsgreedy
- Hockey1600Codeforcesimplementationstrings
- Hometask1600Codeforcesbrute forceconstructive algorithmsgreedymath
- Hometask1600Codeforcesgreedy
- Hongcow Builds A Nation1500Codeforcesdfs and similargraphs
- Hossam and Trainees1600Codeforcesgreedymathnumber theory
- How Does the Rook Move?1600Codeforcescombinatoricsdpmath
- How to Minimize a String1961CodeChef
- Huh, Easy1820CodeChef
- Hungry Games1600Codeforcesbinary searchdptwo pointers
- Hyperset1500Codeforcesbrute forcedata structuresimplementation
- IT Restaurants1500Codeforcesdfs and similardptrees
- Idiot First Search1500Codeforcesdfs and similardptrees
- Igor and his way to work1600Codeforcesdfs and similargraphsimplementationshortest paths
- Ilya and Sticks1600Codeforcesgreedymathsortings
- In Love1500Codeforcesdata structuresgreedy
- Indivisibility1500Codeforcesmathnumber theory
- Infected Tree1600Codeforcesdfs and similardptrees
- Inna and Huge Candy Matrix1500Codeforcesimplementationmath
- Inna and Nine1500Codeforcescombinatoricsgreedy
- Insert a Progression1600Codeforcesbrute forceconstructive algorithmsgreedy
- Integers Shop1500Codeforcesdata structuresgreedyimplementation
- Interactive Bulls and Cows (Easy)1600Codeforcesbrute forceconstructive algorithmsimplementation
- Interesting Binary (Easy Version)1886CodeChef
- Interesting Function1500Codeforcesbinary searchdpmathnumber theory
- Interesting Sequence1600Codeforcesbitmasksmath
- Interesting Story1500Codeforcesgreedysortingsstrings
- Inversions of subsequences1943CodeChef
- Ivan and Powers of Two1600Codeforcesgreedyimplementation
- Jamie and Interesting Graph1600Codeforcesconstructive algorithmsgraphsshortest paths
- Jellyfish and Mex1600Codeforcesdp