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)
7721 Codeforces 1670D: Very Suspicious
7720 Codeforces 1670C: Where is the Pizza?
7719 Codeforces 1670B: Dorms War
7718 Codeforces 1670A: Prof. Slim
7717 Codeforces 1669H: Maximal AND
7716 Codeforces 1669G: Fall Down
7715 Codeforces 1669F: Eating Candies
7714 Codeforces 1669E: 2-Letter Strings
7713 Codeforces 1669D: Colorful Stamp
7712 Codeforces 1669C: Odd/Even Increments
7711 Codeforces 1669B: Triple
7710 Codeforces 1669A: Division?
7709 Codeforces 1668B: Social Distance
7708 Codeforces 1668A: Direction Change
7707 Codeforces 1667F: Yin Yang
7706 Codeforces 1667E: Centroid Probabilities
7705 Codeforces 1667D: Edge Elimination
7704 Codeforces 1667C: Half Queen Cover
7703 Codeforces 1667B: Optimal Partition
7702 Codeforces 1667A: Make it Increasing
7701 Codeforces 1666L: Labyrinth
7700 Codeforces 1666K: Kingdom Partition
7699 Codeforces 1666J: Job Lookup
7698 Codeforces 1666I: Interactive Treasure Hunt
7697 Codeforces 1666H: Heroes of Might
7696 Codeforces 1666G: Global Warming
7695 Codeforces 1666F: Fancy Stack
7694 Codeforces 1666E: Even Split
7693 Codeforces 1666D: Deletive Editing
7692 Codeforces 1666C: Connect the Points
7691 Codeforces 1666B: Budget Distribution
7690 Codeforces 1666A: Admissible Map
7689 Codeforces 1665E: MinimizOR
7688 Codeforces 1665D: GCD Guess
7687 Codeforces 1665C: Tree Infection
7686 Codeforces 1665B: Array Cloning Technique
7685 Codeforces 1665A: GCD vs LCM
7684 Codeforces 1663H: Cross-Language Program
7683 Codeforces 1663G: Six Characters
7682 Codeforces 1663F: In Every Generation...
7681 Codeforces 1663E: Are You Safe?
7680 Codeforces 1663D: Is it rated - 3
7679 Codeforces 1663C: Pōja Verdon
7678 Codeforces 1663B: Mike's Sequence
7677 Codeforces 1663A: Who Tested?
7676 Codeforces 1662O: Circular Maze
7675 Codeforces 1662N: Drone Photo
7674 Codeforces 1662M: Bottle Arrangements
7673 Codeforces 1662L: Il Derby della Madonnina
7672 Codeforces 1662K: Pandemic Restrictions
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