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)
8521 Codeforces 1804D: Accommodation
8520 Codeforces 1804C: Pull Your Luck
8519 Codeforces 1804B: Vaccination
8518 Codeforces 1804A: Lame King
8517 Codeforces 1802B: Settlement of Guinea Pigs
8516 Codeforces 1802A: Likes
8515 Codeforces 1801G: A task for substrings
8514 Codeforces 1801F: Another n-dimensional chocolate bar
8513 Codeforces 1801E: Gasoline prices
8512 Codeforces 1801D: The way home
8511 Codeforces 1801C: Music Festival
8510 Codeforces 1801B: Buying gifts
8509 Codeforces 1801A: The Very Beautiful Blanket
8508 Codeforces 1800G: Symmetree
8507 Codeforces 1800F: Dasha and Nightmares
8506 Codeforces 1800E2: Unforgivable Curse (hard version)
8505 Codeforces 1800E1: Unforgivable Curse (easy version)
8504 Codeforces 1800D: Remove Two Letters
8503 Codeforces 1800C2: Powering the Hero (hard version)
8502 Codeforces 1800C1: Powering the Hero (easy version)
8501 Codeforces 1800B: Count the Number of Pairs
8500 Codeforces 1800A: Is It a Cat?
8499 Codeforces 1799H: Tree Cutting
8498 Codeforces 1799G: Count Voting
8497 Codeforces 1799F: Halve or Subtract
8496 Codeforces 1799E: City Union
8495 Codeforces 1799D2: Hot Start Up (hard version)
8494 Codeforces 1799D1: Hot Start Up (easy version)
8493 Codeforces 1799C: Double Lexicographically Minimum
8492 Codeforces 1799B: Equalize by Divide
8491 Codeforces 1799A: Recent Actions
8490 Codeforces 1798F: Gifts from Grandfather Ahmed
8489 Codeforces 1798E: Multitest Generator
8488 Codeforces 1798D: Shocking Arrangement
8487 Codeforces 1798C: Candy Store
8486 Codeforces 1798B: Three Sevens
8485 Codeforces 1798A: Showstopper
8484 Codeforces 1797F: Li Hua and Path
8483 Codeforces 1797E: Li Hua and Array
8482 Codeforces 1797D: Li Hua and Tree
8481 Codeforces 1797C: Li Hua and Chess
8480 Codeforces 1797B: Li Hua and Pattern
8479 Codeforces 1797A: Li Hua and Maze
8478 Codeforces 1796F: Strange Triples
8477 Codeforces 1796E: Colored Subgraphs
8476 Codeforces 1796D: Maximum Subarray
8475 Codeforces 1796C: Maximum Set
8474 Codeforces 1796B: Asterisk-Minor Template
8473 Codeforces 1796A: Typical Interview Problem
8472 Codeforces 1795G: Removal Sequences
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