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)
23798 USACO 2023 US Open Contest, Bronze: Rotate and Shift
23797 USACO 2023 US Open Contest, Bronze: Moo Language
23796 USACO 2023 US Open Contest, Bronze: FEB
23795 USACO 2023 US Open Contest, Silver: Pareidolia
23794 USACO 2023 US Open Contest, Silver: Field Day
23793 USACO 2023 US Open Contest, Silver: Milk Sum
23792 USACO 2023 US Open Contest, Gold: Tree Merging
23791 USACO 2023 US Open Contest, Gold: Pareidolia
23790 USACO 2023 US Open Contest, Gold: Custodial Cleanup
23789 USACO 2023 US Open Contest, Platinum: Triples of Cows
23788 USACO 2023 US Open Contest, Platinum: Good Bitstrings
23787 USACO 2023 US Open Contest, Platinum: Pareidolia
23786 USACO 2023 February Contest, Bronze: Watching Mooloo
23785 USACO 2023 February Contest, Bronze: Stamp Grid
23784 USACO 2023 February Contest, Bronze: Hungry Cow
23783 USACO 2023 February Contest, Silver: Moo Route II
23782 USACO 2023 February Contest, Silver: Cow-libi
23781 USACO 2023 February Contest, Silver: Bakery
23780 USACO 2023 February Contest, Gold: Piling Papers
23779 USACO 2023 February Contest, Gold: Fertilizing Pastures
23778 USACO 2023 February Contest, Gold: Equal Sum Subarrays
23777 USACO 2023 February Contest, Platinum: Watching Cowflix
23776 USACO 2023 February Contest, Platinum: Problem Setting
23775 USACO 2023 February Contest, Platinum: Hungry Cow
23774 USACO 2023 January Contest, Bronze: Moo Operations
23773 USACO 2023 January Contest, Bronze: Air Cownditioning II
23772 USACO 2023 January Contest, Bronze: Leaders
23771 USACO 2023 January Contest, Silver: Moo Route
23770 USACO 2023 January Contest, Silver: Following Directions
23769 USACO 2023 January Contest, Silver: Find and Replace
23768 USACO 2023 January Contest, Gold: Moo Route
23767 USACO 2023 January Contest, Gold: Lights Off
23766 USACO 2023 January Contest, Gold: Find and Replace
23765 USACO 2023 January Contest, Platinum: Subtree Activation
23764 USACO 2023 January Contest, Platinum: Mana Collection
23763 USACO 2023 January Contest, Platinum: Tractor Paths
23762 USACO 2022 US Open Contest, Bronze: Alchemy
23761 USACO 2022 US Open Contest, Bronze: Counting Liars
23760 USACO 2022 US Open Contest, Bronze: Photoshoot
23759 USACO 2022 US Open Contest, Silver: COW Operations
23758 USACO 2022 US Open Contest, Silver: Subset Equality
23757 USACO 2022 US Open Contest, Silver: Visits
23756 USACO 2022 US Open Contest, Gold: Balancing a Tree
23755 USACO 2022 US Open Contest, Gold: Pair Programming
23754 USACO 2022 US Open Contest, Gold: Apple Catching
23753 USACO 2022 US Open Contest, Platinum: Up Down Subsequence
23752 USACO 2022 US Open Contest, Platinum: Hoof and Brain
23751 USACO 2022 US Open Contest, Platinum: 262144 Revisited
23750 USACO 2022 February Contest, Bronze: Blocks
23749 USACO 2022 February Contest, Bronze: Photoshoot 2
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