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Over 20,000 problems available: AMC 8/10/12 and AIME problems from 2010-2024; USAJMO/USAMO problems from 2002-2024; USACO problems from 2014 to 2024 (all divisions); all Codeforces, AtCoder and DMOJ problems. If you leave the search field blank, it returns all problems with the specified type.

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  • AMC 8: [year] AMC 8 Problem #, Ex: 2013 AMC 8 Problem 1
  • AMC 10: [year] AMC 10A Problem # OR [year] AMC 10B Problem #, Ex: 2015 AMC 10A Problem 16
  • AMC 12: [year] AMC 12A Problem # OR [year] AMC 12B Problem #, Ex: 2021 AMC 12B Problem 25
  • AIME: [year] AIME I Problem # OR [year] AIME II Problem #, Ex: 2013 AIME I Problem 8
  • USAJMO/USAMO: [year] USAJMO/USAMO Problem #, Ex: 2023 USAJMO Problem 1
  • Codeforces: Codeforces [contest id (e.g. 101)][problem id (e.g. A, B, C)]: [Codeforces problem name], Ex: Codeforces 1336F: Journey
  • AtCoder: AtCoder [contest id (e.g. ABC314, ARC164, ZONE2021)]: [problem id (A, B, C)]. [Problem name], Ex: AtCoder ZONE2021: E. Sneaking
  • DMOJ: DMOJ [contest name (if applicable)] [problem number (e.g. P1)] - [Problem name], Ex: DMOJ Yet Another Contest 3 P1 - Shell Swap Scam
  • USACO: [year] [contest month (e.g. January, US Open)], [division (e.g. Gold)]: [Problem name], Ex: USACO 2023 US Open Contest, Bronze: Rotate and Shift

ID Problem Name (click to add insights/hints, view summary of insights/hints and similar problems)
17855 DMOJ GFSSOC '15 Winter J4 - Christmas Music
17854 DMOJ GFSSOC '15 Winter J3 - Christmas Presents
17853 DMOJ GFSSOC '15 Winter J2 - Purchasing Presents
17852 DMOJ GFSSOC '15 Winter J1 - Festive Fardin
17851 DMOJ GFSSOC '15 Fall S5 - Raider
17850 DMOJ GFSSOC '15 Fall S4 - Mostly Talking
17849 DMOJ GFSSOC '15 Fall S3 - System(0);
17848 DMOJ GFSSOC '15 Fall S2 - Hearth
17847 DMOJ GFSSOC '15 Fall S1 - T-Shirts
17846 DMOJ GFSSOC '15 Fall J5 - Nightmare-a-thon
17845 DMOJ GFSSOC '15 Fall J4 - Marathon
17844 DMOJ GFSSOC '15 Fall J3 - Equation Solver
17843 DMOJ GFSSOC '15 Fall J2 - Fizz Fuzz
17842 DMOJ GFSSOC '15 Fall J1 - CodeFights
17841 DMOJ GFSSOC '14 Winter S5 - Stardust Snow
17840 DMOJ GFSSOC '14 Winter S4 - Stalactites
17839 DMOJ GFSSOC '14 Winter S3 - Hide n Seek
17838 DMOJ GFSSOC '14 Winter S2 - Speech
17837 DMOJ GFSSOC '14 Winter S1 - Friendship is a number
17836 DMOJ GFSSOC '14 Winter J5 - Pursuit of Knowledge
17835 DMOJ GFSSOC '14 Winter J4 - Tic Tac Moe!
17834 DMOJ GFSSOC '14 Winter J3 - Waiting
17833 DMOJ GFSSOC '14 Winter J2 - Wow much parking lot
17832 DMOJ GFSSOC '14 Winter J1 - Flying Plushies
17831 DMOJ GFSSOC '17 S4 - First Ace
17830 DMOJ GFSSOC '17 S3 - Zhany Zhanbies
17829 DMOJ GFSSOC '17 S2 - Ace is Base
17828 DMOJ GFSSOC '17 S1 - Path to Waterloo
17827 DMOJ GFSSOC '17 J5 - Choosing Extracurriculars
17826 DMOJ GFSSOC '17 J4 - Top Courses
17825 DMOJ GFSSOC '17 J3 - AIF Essay
17824 DMOJ GFSSOC '17 J2 - Admission Average
17823 DMOJ GFSSOC '17 J1 - Ramen and Studying
17822 DMOJ GFSS Christmas Challenge P4 - Coal Counting
17821 DMOJ GFSS Christmas Challenge P3 - Candy Distribution
17820 DMOJ GFSS Christmas Challenge P2 - Height Inspection
17819 DMOJ GFSS Christmas Challenge P1 - Arithmetic Operators
17818 DMOJ Troubling Triangles
17817 DMOJ Geography Class
17816 DMOJ Google Code Jam '22 Round 3 Problem C - Mascot Maze
17815 DMOJ Google Code Jam '22 Round 3 Problem B - Duck, Duck, Geese
17814 DMOJ Google Code Jam '22 Round 2 Problem D - I, O Bot
17813 DMOJ Google Code Jam '22 Round 2 Problem C - Saving the Jelly
17812 DMOJ Google Code Jam '22 Round 2 Problem B - Pixelated Circle
17811 DMOJ Google Code Jam '22 Round 2 Problem A - Spiraling Into Control
17810 DMOJ Google Code Jam '22 Round 1C Problem C - Intranets
17809 DMOJ Google Code Jam '22 Round 1C Problem B - Squary
17808 DMOJ Google Code Jam '22 Round 1C Problem A - Letter Blocks
17807 DMOJ Google Code Jam '22 Round 1B Problem B - Controlled Inflation
17806 DMOJ Google Code Jam '22 Round 1B Problem A - Pancake Deque
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