Starlight: List of Problems

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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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ID Problem Name (click to add insights/hints, view summary of insights/hints and similar problems)
6051 Codeforces 1356A2: Distinguish I from Z
6050 Codeforces 1356A1: Distinguish I from X
6049 Codeforces 1355F: Guess Divisors Count
6048 Codeforces 1355E: Restorer Distance
6047 Codeforces 1355D: Game With Array
6046 Codeforces 1355C: Count Triangles
6045 Codeforces 1355B: Young Explorers
6044 Codeforces 1355A: Sequence with Digits
6043 Codeforces 1354G: Find a Gift
6042 Codeforces 1354F: Summoning Minions
6041 Codeforces 1354E: Graph Coloring
6040 Codeforces 1354D: Multiset
6039 Codeforces 1354C2: Not So Simple Polygon Embedding
6038 Codeforces 1354C1: Simple Polygon Embedding
6037 Codeforces 1354B: Ternary String
6036 Codeforces 1354A: Alarm Clock
6035 Codeforces 1353F: Decreasing Heights
6034 Codeforces 1353E: K-periodic Garland
6033 Codeforces 1353D: Constructing the Array
6032 Codeforces 1353C: Board Moves
6031 Codeforces 1353B: Two Arrays And Swaps
6030 Codeforces 1353A: Most Unstable Array
6029 Codeforces 1352G: Special Permutation
6028 Codeforces 1352F: Binary String Reconstruction
6027 Codeforces 1352E: Special Elements
6026 Codeforces 1352D: Alice, Bob and Candies
6025 Codeforces 1352C: K-th Not Divisible by n
6024 Codeforces 1352B: Same Parity Summands
6023 Codeforces 1352A: Sum of Round Numbers
6022 Codeforces 1351C: Skier
6021 Codeforces 1351B: Square?
6020 Codeforces 1351A: A+B (Trial Problem)
6019 Codeforces 1350B: Orac and Models
6018 Codeforces 1350A: Orac and Factors
6017 Codeforces 1349F2: Slime and Sequences (Hard Version)
6016 Codeforces 1349F1: Slime and Sequences (Easy Version)
6015 Codeforces 1349E: Slime and Hats
6014 Codeforces 1349D: Slime and Biscuits
6013 Codeforces 1349C: Orac and Game of Life
6012 Codeforces 1349B: Orac and Medians
6011 Codeforces 1349A: Orac and LCM
6010 Codeforces 1348F: Phoenix and Memory
6009 Codeforces 1348E: Phoenix and Berries
6008 Codeforces 1348D: Phoenix and Science
6007 Codeforces 1348C: Phoenix and Distribution
6006 Codeforces 1348B: Phoenix and Beauty
6005 Codeforces 1348A: Phoenix and Balance
6004 Codeforces 1346I: Pac-Man 2.0
6003 Codeforces 1346H: Game with Segments
6002 Codeforces 1346G: Two IP Cameras
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