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)
13321 AtCoder JSC2022-FINAL-OPEN: F. Share the Recipe
13320 AtCoder JSC2022-FINAL-OPEN: E. Circular Sushi
13319 AtCoder JSC2022-FINAL-OPEN: D. And is 0
13318 AtCoder JSC2022-FINAL-OPEN: C. Not a Multiple of 3
13317 AtCoder JSC2022-FINAL-OPEN: B. Increment and Rotate
13316 AtCoder JSC2022-FINAL-OPEN: A. Max and Argmax
13315 AtCoder JSC2021: H. Shipping
13314 AtCoder JSC2021: G. Spanning Tree
13313 AtCoder JSC2021: F. Max Matrix
13312 AtCoder JSC2021: E. Level K Palindrome
13311 AtCoder JSC2021: D. Nowhere P
13310 AtCoder JSC2021: C. Max GCD 2
13309 AtCoder JSC2021: B. Xor of Sequences
13308 AtCoder JSC2021: A. Competition
13307 AtCoder JSC2019-QUAL: F. Candy Retribution
13306 AtCoder JSC2019-QUAL: E. Card Collector
13305 AtCoder JSC2019-QUAL: D. Classified
13304 AtCoder JSC2019-QUAL: C. Cell Inversion
13303 AtCoder JSC2019-QUAL: B. Kleene Inversion
13302 AtCoder JSC2019-QUAL: A. Takahashi Calendar
13301 AtCoder JSC2019-FINAL: H. Distinct Integers
13300 AtCoder JSC2019-FINAL: G. Important Bridges
13299 AtCoder JSC2019-FINAL: F. Count Permutations Many Times
13298 AtCoder JSC2019-FINAL: E. Nearest String
13297 AtCoder JSC2019-FINAL: D. Minimize Maximum
13296 AtCoder JSC2019-FINAL: C. Maximize Minimum
13295 AtCoder JSC2019-FINAL: B. Reachability
13294 AtCoder JSC2019-FINAL: A. Equal Weight
13293 AtCoder JOISP2023: L. ビ太郎の旅 (Bitaro's Travel)
13292 AtCoder JOISP2023: K. 警備員 (Security Guard)
13291 AtCoder JOISP2023: J. 最後の戦い (The Last Battle)
13290 AtCoder JOISP2023: I. 旅行 (Tourism)
13289 AtCoder JOISP2023: H. クッキー (Cookies)
13288 AtCoder JOISP2023: G. ビーバーの合唱 (Chorus)
13287 AtCoder JOISP2023: F. 水ようかん 2 (Mizuyokan 2)
13286 AtCoder JOISP2023: E. 議会 (Council)
13285 AtCoder JOISP2023: D. ベルトコンベア (Belt Conveyor)
13284 AtCoder JOISP2023: C. パスポート (Passport)
13283 AtCoder JOISP2023: B. JOI 国のお祭り事情 2 (Festivals in JOI Kingdom 2)
13282 AtCoder JOISP2023: A. ふたつの通貨 (Two Currencies)
13281 AtCoder JOISC2022: L. 復興事業 (Reconstruction Project)
13280 AtCoder JOISC2022: K. 魚 2 (Fish 2)
13279 AtCoder JOISC2022: J. 一流の団子職人 (Super Dango Maker)
13278 AtCoder JOISC2022: I. 蟻と角砂糖 (Ants and Sugar)
13277 AtCoder JOISC2022: H. スプリンクラー (Sprinkler)
13276 AtCoder JOISC2022: G. 壊れた機器 2 (Broken Device 2)
13275 AtCoder JOISC2022: F. チーム戦 (Team Contest)
13274 AtCoder JOISC2022: E. 飛行機旅行 (Flights)
13273 AtCoder JOISC2022: D. コピー & ペースト 3 (Copy and Paste 3)
13272 AtCoder JOISC2022: C. スペルミス (Misspelling)
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