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)
23421 USACO 2015 US Open, Silver: Bessie Goes Moo
23420 USACO 2015 US Open, Gold: Trapped in the Haybales (Gold)
23419 USACO 2015 US Open, Gold: Palindromic Paths
23418 USACO 2015 US Open, Gold: Googol
23417 USACO 2015 February Contest, Bronze: Cow Hopscotch (Bronze)
23416 USACO 2015 February Contest, Bronze: COW
23415 USACO 2015 February Contest, Bronze: Censoring (Bronze)
23414 USACO 2015 February Contest, Silver: Superbull
23413 USACO 2015 February Contest, Silver: Cow Hopscotch (Silver)
23412 USACO 2015 February Contest, Silver: Censoring (Silver)
23411 USACO 2015 February Contest, Gold: Fencing the Herd
23410 USACO 2015 February Contest, Gold: Censoring (Gold)
23409 USACO 2015 February Contest, Gold: Cow Hopscotch (Gold)
23408 USACO 2015 January Contest, Bronze: Meeting Time
23407 USACO 2015 January Contest, Bronze: It's All About the Base
23406 USACO 2015 January Contest, Bronze: Cow Routing II
23405 USACO 2015 January Contest, Bronze: Cow Routing
23404 USACO 2015 January Contest, Silver: Meeting Time
23403 USACO 2015 January Contest, Silver: Cow Routing
23402 USACO 2015 January Contest, Silver: Stampede
23401 USACO 2015 January Contest, Gold: Grass Cownoisseur
23400 USACO 2015 January Contest, Gold: Moovie Mooving
23399 USACO 2015 January Contest, Gold: Cow Rectangles
23398 USACO 2015 December Contest, Bronze: Contaminated Milk
23397 USACO 2015 December Contest, Bronze: Speeding Ticket
23396 USACO 2015 December Contest, Bronze: Fence Painting
23395 USACO 2015 December Contest, Silver: Breed Counting
23394 USACO 2015 December Contest, Silver: High Card Wins
23393 USACO 2015 December Contest, Silver: Switching on the Lights
23392 USACO 2015 December Contest, Gold: Bessie's Dream
23391 USACO 2015 December Contest, Gold: Fruit Feast
23390 USACO 2015 December Contest, Gold: High Card Low Card (Gold)
23389 USACO 2015 December Contest, Platinum: Counting Haybales
23388 USACO 2015 December Contest, Platinum: High Card Low Card (Platinum)
23387 USACO 2015 December Contest, Platinum: Max Flow
23386 USACO 2014 December Contest, Bronze: Learning by Example
23385 USACO 2014 December Contest, Bronze: Cow Jog
23384 USACO 2014 December Contest, Bronze: Crosswords
23383 USACO 2014 December Contest, Bronze: Marathon
23382 USACO 2014 December Contest, Silver: Cow Jog
23381 USACO 2014 December Contest, Silver: Marathon
23380 USACO 2014 December Contest, Silver: Piggyback
23379 USACO 2014 December Contest, Gold: Cow Jog
23378 USACO 2014 December Contest, Gold: Marathon
23377 USACO 2014 December Contest, Gold: Guard Mark
23376 2023 USAJMO Problem 6
23375 2023 USAJMO Problem 5
23374 2023 USAJMO Problem 4
23373 2023 USAJMO Problem 3
23372 2023 USAJMO Problem 2
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