Starlight: List of Problems

Over 20,000 problems available. AMC 8/10/12 and AIME problems from 2010-2023; USAJMO/USAMO problems from 2002-2023 available. USACO problems from 2014 to 2023 (all divisions). Codeforces, AtCoder, DMOJ problems are added daily around 04:00 AM UTC, which may cause disruptions.

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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)
16851	DMOJ DMOPC '14 Exam Time P5 - Happy Teachers
16850	DMOJ DMOPC '14 Exam Time P4 - Exam Delay
16849	DMOJ DMOPC '14 Exam Time P3 - Chemistry Homework
16848	DMOJ DMOPC '14 Exam Time P2 - Physics Duel
16847	DMOJ DMOPC '14 Exam Time P1 - French Homework
16846	DMOJ DMOPC '14 Contest 7 P6 - Revenge of the Bins
16845	DMOJ DMOPC '14 Contest 7 P5 - Aurora
16844	DMOJ DMOPC '14 Contest 7 P4 - Sand Triangle
16843	DMOJ DMOPC '14 Contest 7 P3 - Globally Unique Shells
16842	DMOJ DMOPC '14 Contest 7 P2 - Tides
16841	DMOJ DMOPC '14 Contest 7 P1 - Flare
16840	DMOJ DMOPC '14 Contest 6 P6 - Trip
16839	DMOJ DMOPC '14 Contest 6 P5 - Planning
16838	DMOJ DMOPC '14 Contest 6 P4 - Bus Jam
16837	DMOJ DMOPC '14 Contest 6 P3 - Streetcars
16836	DMOJ DMOPC '14 Contest 6 P2 - GO Faster
16835	DMOJ DMOPC '14 Contest 6 P1 - Finding Bessarion
16834	DMOJ DMOPC '14 Contest 5 P6 - Nia and Dominoes
16833	DMOJ DMOPC '14 Contest 5 P5 - Attack on Anti-Spiral
16832	DMOJ DMOPC '14 Contest 5 P4 - Kittan's Dilemma
16831	DMOJ DMOPC '14 Contest 5 P3 - Brotherly Sequence
16830	DMOJ DMOPC '14 Contest 5 P2 - Longest Tunnel
16829	DMOJ DMOPC '14 Contest 5 P1 - Core Drill
16828	DMOJ DMOPC '14 Contest 4 P6 - Save Nagato!
16827	DMOJ DMOPC '14 Contest 4 P5 - Aircraft Carrier Akagi
16826	DMOJ DMOPC '14 Contest 4 P4 - Sketchley Park
16825	DMOJ DMOPC '14 Contest 4 P3 - Golden Lily
16824	DMOJ DMOPC '14 Contest 4 P2 - Redirection
16823	DMOJ DMOPC '14 Contest 4 P1 - New Key
16822	DMOJ DMOPC '14 Contest 3 P6 - Not Enough Time!
16821	DMOJ DMOPC '14 Contest 3 P5 - Not Enough Servers!
16820	DMOJ DMOPC '14 Contest 3 P4 - Not Enough Testers!
16819	DMOJ DMOPC '14 Contest 3 P3 - Not Enough Personnel!
16818	DMOJ DMOPC '14 Contest 3 P2 - Not Enough Rejudging!
16817	DMOJ DMOPC '14 Contest 3 P1 - Not Enough Users!
16816	DMOJ DMOPC '14 Contest 2 P6 - Selective Cutting
16815	DMOJ DMOPC '14 Contest 2 P5 - Sawmill Scheme
16814	DMOJ DMOPC '14 Contest 2 P4 - Deforestation
16813	DMOJ DMOPC '14 Contest 2 P3 - Sawmill
16812	DMOJ DMOPC '14 Contest 2 P2 - Cutting Logs
16811	DMOJ DMOPC '14 Contest 2 P1 - Logging Log
16810	DMOJ DMOPC '14 Contest 1 P6 - Biology Homework
16809	DMOJ DMOPC '14 Contest 1 P5 - Surprise Teleport
16808	DMOJ DMOPC '14 Contest 1 P4 - Perfect Timing
16807	DMOJ DMOPC '14 Contest 1 P3 - New Students
16806	DMOJ DMOPC '14 Contest 1 P2 - Tiles
16805	DMOJ DMOPC '14 Contest 1 P1 - Median Mark
16804	DMOJ DMOPC '13 Contest 3 P5 - A Romantic Dinner
16803	DMOJ DMOPC '13 Contest 3 P4 - Snowman
16802	DMOJ DMOPC '13 Contest 3 P3 - Crossing Field

Problem Name (click to add insights/hints, view summary of insights/hints and similar problems)

16851

DMOJ DMOPC '14 Exam Time P5 - Happy Teachers

16850

DMOJ DMOPC '14 Exam Time P4 - Exam Delay

16849

DMOJ DMOPC '14 Exam Time P3 - Chemistry Homework

16848

DMOJ DMOPC '14 Exam Time P2 - Physics Duel

16847

DMOJ DMOPC '14 Exam Time P1 - French Homework

16846