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)
10971 AtCoder AGC057: E. RowCol/ColRow Sort
10970 AtCoder AGC057: D. Sum Avoidance
10969 AtCoder AGC057: C. Increment or Xor
10968 AtCoder AGC057: B. 2A + x
10967 AtCoder AGC057: A. Antichain of Integer Strings
10966 AtCoder AGC056: F. Degree Sequence in DFS Order
10965 AtCoder AGC056: E. Cheese
10964 AtCoder AGC056: D. Subset Sum Game
10963 AtCoder AGC056: C. 01 Balanced
10962 AtCoder AGC056: B. Range Argmax
10961 AtCoder AGC056: A. Three Cells per Row and Column
10960 AtCoder AGC055: F. Creative Splitting
10959 AtCoder AGC055: E. Set Merging
10958 AtCoder AGC055: D. ABC Ultimatum
10957 AtCoder AGC055: C. Weird LIS
10956 AtCoder AGC055: B. ABC Supremacy
10955 AtCoder AGC055: A. ABC Identity
10954 AtCoder AGC054: F. Decrement
10953 AtCoder AGC054: E. ZigZag Break
10952 AtCoder AGC054: D. (ox)
10951 AtCoder AGC054: C. Roughly Sorted
10950 AtCoder AGC054: B. Greedy Division
10949 AtCoder AGC054: A. Remove Substrings
10948 AtCoder AGC053: F. ESPers
10947 AtCoder AGC053: E. More Peaks More Fun
10946 AtCoder AGC053: D. Everyone is a winner
10945 AtCoder AGC053: C. Random Card Game
10944 AtCoder AGC053: B. Taking the middle
10943 AtCoder AGC053: A. >< again
10942 AtCoder AGC052: F. Tree Vertices XOR
10941 AtCoder AGC052: E. 3 Letters
10940 AtCoder AGC052: D. Equal LIS
10939 AtCoder AGC052: C. Nondivisible Prefix Sums
10938 AtCoder AGC052: B. Tree Edges XOR
10937 AtCoder AGC052: A. Long Common Subsequence
10936 AtCoder AGC051: F. rng_58's Last Problem
10935 AtCoder AGC051: E. Middle Point
10934 AtCoder AGC051: D. C4
10933 AtCoder AGC051: C. Flipper
10932 AtCoder AGC051: B. Bowling
10931 AtCoder AGC051: A. Dodecagon
10930 AtCoder AGC050: F. NAND Tree
10929 AtCoder AGC050: E. Three Traffic Lights
10928 AtCoder AGC050: D. Shopping
10927 AtCoder AGC050: C. Block Game
10926 AtCoder AGC050: B. Three Coins
10925 AtCoder AGC050: A. AtCoder Jumper
10924 AtCoder AGC049: F. Happy Sequence
10923 AtCoder AGC049: E. Increment Decrement
10922 AtCoder AGC049: D. Convex Sequence
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