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)
6751	Codeforces 1490F: Equalize the Array
6750	Codeforces 1490E: Accidental Victory
6749	Codeforces 1490D: Permutation Transformation
6748	Codeforces 1490C: Sum of Cubes
6747	Codeforces 1490B: Balanced Remainders
6746	Codeforces 1490A: Dense Array
6745	Codeforces 1488J: Flower Shop
6744	Codeforces 1488I: Demonic Invasion
6743	Codeforces 1488H: Build From Suffixes
6742	Codeforces 1488G: Painting Numbers
6741	Codeforces 1488F: Dogecoin
6740	Codeforces 1488E: Palindromic Doubles
6739	Codeforces 1488D: Problemsolving Marathon
6738	Codeforces 1488C: Two Policemen
6737	Codeforces 1488B: RBS Deletion
6736	Codeforces 1488A: From Zero To Y
6735	Codeforces 1487G: String Counting
6734	Codeforces 1487F: Ones
6733	Codeforces 1487E: Cheap Dinner
6732	Codeforces 1487D: Pythagorean Triples
6731	Codeforces 1487C: Minimum Ties
6730	Codeforces 1487B: Cat Cycle
6729	Codeforces 1487A: Arena
6728	Codeforces 1486F: Pairs of Paths
6727	Codeforces 1486E: Paired Payment
6726	Codeforces 1486D: Max Median
6725	Codeforces 1486C2: Guessing the Greatest (hard version)
6724	Codeforces 1486C1: Guessing the Greatest (easy version)
6723	Codeforces 1486B: Eastern Exhibition
6722	Codeforces 1486A: Shifting Stacks
6721	Codeforces 1485F: Copy or Prefix Sum
6720	Codeforces 1485E: Move and Swap
6719	Codeforces 1485D: Multiples and Power Differences
6718	Codeforces 1485C: Floor and Mod
6717	Codeforces 1485B: Replace and Keep Sorted
6716	Codeforces 1485A: Add and Divide
6715	Codeforces 1482H: Exam
6714	Codeforces 1482G: Vabank
6713	Codeforces 1482F: Useful Edges
6712	Codeforces 1482E: Skyline Photo
6711	Codeforces 1482D: Playlist
6710	Codeforces 1482C: Basic Diplomacy
6709	Codeforces 1482B: Restore Modulo
6708	Codeforces 1482A: Prison Break
6707	Codeforces 1481F: AB Tree
6706	Codeforces 1481E: Sorting Books
6705	Codeforces 1481D: AB Graph
6704	Codeforces 1481C: Fence Painting
6703	Codeforces 1481B: New Colony
6702	Codeforces 1481A: Space Navigation

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

6751

Codeforces 1490F: Equalize the Array

6750

Codeforces 1490E: Accidental Victory

6749

Codeforces 1490D: Permutation Transformation

6748

Codeforces 1490C: Sum of Cubes

6747

Codeforces 1490B: Balanced Remainders

6746