Introductory Problems
- Weird_Algorithm (problem site)
- Missing_Number (problem site)
- Repetitions (problem site)
- Increasing_Array (problem site)
- Permutations (problem site)
- Number_Spiral (problem site)
- Two_Knights (problem site)
- Two_Sets (problem site)
- Bit_Strings (problem site)
- Trailing_Zeros (problem site)
- Coin_Piles (problem site)
- Palindrome_Reorder (problem site)
- Creating_Strings_I (problem site)
- Apple_Division (problem site)
- Chessboard_and_Queens (problem site)
- Grid_Paths (problem site)
Sorting and Searching
- Distinct_Numbers (problem site)
- Apartments (problem site)
- Ferris_Wheel (problem site)
- Concert_Tickets (problem site)
- Restaurant_Customers (problem site)
- Movie_Festival (problem site)
- Sum_of_Two_Values (problem site)
- Maximum_Subarray_Sum (problem site)
- Stick_Lengths (problem site)
- Playlist (problem site)
- Towers (problem site)
- Traffic_Lights (problem site)
- Room_Allocation (problem site)
- Factory_Machines (problem site)
- Tasks_and_Deadlines (problem site)
- Reading_Books (problem site)
- Sum_of_Three_Values (problem site)
- Sum_of_Four_Values (problem site)
- Nearest_Smaller_Values (problem site)
- Subarray_Sums_I (problem site)
- Subarray_Sums_II (problem site)
- Subarray_Divisibility (problem site)
- Array_Division (problem site)
- Sliding_Median (problem site)
- Sliding_Cost (problem site)
- Movie_Festival_II (problem site)
- Maximum_Subarray_Sum_II (problem site)
Dynamic Programming
- Dice_Combinations (problem site)
- Minimizing_Coins (problem site)
- Coin_Combinations_I (problem site)
- Coin_Combinations_II (problem site)
- Removing_Digits (problem site)
- Grid_Paths (problem site)
- Book_Shop (problem site)
- Array_Description (problem site)
- Edit_Distance (problem site)
- Rectangle_Cutting (problem site)
- Money_Sums (problem site)
- Removal_Game (problem site)
- Two_Sets_II (problem site)
- Increasing_Subsequence (problem site)
- Projects (problem site)
Graph Algorithms
- Counting_Rooms (problem site)
- Labyrinth (problem site)
- Building_Roads (problem site)
- Message_Route (problem site)
- Building_Teams (problem site)
- Round_Trip (problem site)
- Monsters (problem site)
- Shortest_Routes_I (problem site)
- Shortest_Routes_II (problem site)
- High_Score (problem site)
- Flight_Discount (problem site)
- Cycle_Finding (problem site)
- Flight_Routes (problem site)
- Round_Trip_II (problem site)
- Course_Schedule (problem site)
- Longest_Flight_Route (problem site)
- Game_Routes (problem site)
- Investigation (problem site)
- Planets_Queries_I (problem site)
- Planets_Queries_II (problem site)
- Planets_Cycles (problem site)
- Road_Reparation (problem site)
- Road_Construction (problem site)
- Flight_Routes_Check (problem site)
- Planets_and_Kingdoms (problem site)
- Giant_Pizza (problem site)
- Coin_Collector (problem site)
- Mail_Delivery (problem site)
- De_Bruijn_Sequence (problem site)
- Teleporters_Path (problem site)
- Hamiltonian_Flights (problem site)
- Knight's_Tour (problem site)
- Download_Speed (problem site)
- Police_Chase (problem site)
- School_Dance (problem site)
- Distinct_Routes (problem site)
Range Queries
- Range_Sum_Queries_I (problem site)
- Range_Minimum_Queries_I (problem site)
- Range_Sum_Queries_II (problem site)
- Range_Minimum_Queries_II (problem site)
- Range_Xor_Queries (problem site)
- Range_Update_Queries (problem site)
- Forest_Queries (problem site)
- Hotel_Queries (problem site)
- List_Removals (problem site)
- Salary_Queries (problem site)
- Subarray_Sum_Queries (problem site)
- Distinct_Values_Queries (problem site)
- Forest_Queries_II (problem site)
- Range_Updates_and_Sums (problem site)
- Polynomial_Queries (problem site)
- Range_Queries_and_Copies (problem site)
Tree Algorithms
- Subordinates (problem site)
- Tree_Matching (problem site)
- Tree_Diameter (problem site)
- Tree_Distances_I (problem site)
- Tree_Distances_II (problem site)
- Company_Queries_I (problem site)
- Company_Queries_II (problem site)
- Distance_Queries (problem site)
- Counting_Paths (problem site)
- Subtree_Queries (problem site)
- Path_Queries (problem site)
- Distinct_Colors (problem site)
Mathematics
- Exponentiation (problem site)
- Exponentiation_II (problem site)
- Counting_Divisors (problem site)
- Common_Divisors (problem site)
- Sum_of_Divisors (problem site)
- Binomial_Coefficients (problem site)
- Creating_Strings_II (problem site)
- Distributing_Apples (problem site)
- Christmas_Party (problem site)
- Fibonacci_Numbers (problem site)
- Throwing_Dice (problem site)
- Graph_Paths_I (problem site)
- Graph_Paths_II (problem site)
- Dice_Probability (problem site)
- Moving_Robots (problem site)
- Candy_Lottery (problem site)
- Inversion_Probability (problem site)
- Stick_Game (problem site)
- Nim_Game_I (problem site)
- Nim_Game_II (problem site)
- Stair_Game (problem site)
- Word_Combinations (problem site)
- String_Matching (problem site)
- Finding_Borders (problem site)
- Finding_Periods (problem site)
- Minimal_Rotation (problem site)
- Longest_Palindrome (problem site)
- Required_Substring (problem site)
- Shortest_Subsequence (problem site)
- Counting_Bits (problem site)
- Swap_Game (problem site)
- Meet_in_the_Middle (problem site)
- Prüfer_Code (problem site)
- Edge_Directions (problem site)
- Advertisement (problem site)
- Elevator_Rides (problem site)
- Maximum_Xor_Subarray (problem site)
- Movie_Festival_Queries (problem site)
- Chess_Tournament (problem site)
- Tree_Traversals (problem site)
- Network_Renovation (problem site)
- Graph_Girth (problem site)
- Intersection_Points (problem site)
- String_Reorder (problem site)
- Pyramid_Array (problem site)
- Increasing_Subsequence_II (problem site)
- String_Removals (problem site)
- Bit_Inversions (problem site)
- Writing_Numbers (problem site)
- String_Transform (problem site)
- Maximum_Building_I (problem site)
- Sorting_Methods (problem site)
- Cyclic_Array (problem site)
- Food_Division (problem site)
- Bit_Problem (problem site)
- Swap_Round_Sorting (problem site)
- Tree_Isomorphism_I (problem site)
- Critical_Cities (problem site)
- School_Excursion (problem site)
- Coin_Grid (problem site)
- Robot_Path (problem site)
- Course_Schedule_II (problem site)
- Empty_String (problem site)
- Grid_Paths (problem site)
- Book_Shop_II (problem site)
- Network_Breakdown (problem site)
- Visiting_Cities (problem site)
- Number_Grid (problem site)
- Maximum_Building_II (problem site)
- Stick_Divisions (problem site)
- Coding_Company (problem site)
- Flight_Route_Requests (problem site)
- Tree_Isomorphism_II (problem site)
- Forbidden_Cities (problem site)
- Area_of_Rectangles (problem site)
- Creating_Offices (problem site)
- Permutations_II (problem site)
- New_Flight_Routes (problem site)