AtCoder Beginner Contest 250

F - One Fourth

https://atcoder.jp/contests/abc250/tasks/abc250_f

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AtCoder Beginner Contest 250

E - Prefix Equality

https://atcoder.jp/contests/abc250/tasks/abc250_e

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Monoxer Programming Contest 2022（AtCoder Beginner Contest 249）

F - Ignore Operations

https://atcoder.jp/contests/abc249/tasks/abc249_f

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Monoxer Programming Contest 2022（AtCoder Beginner Contest 249）

E - RLE

https://atcoder.jp/contests/abc249/tasks/abc249_e

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UNIQUE VISION Programming Contest 2022（AtCoder Beginner Contest 248）

F - Keep Connect

https://atcoder.jp/contests/abc248/tasks/abc248_f

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UNIQUE VISION Programming Contest 2022（AtCoder Beginner Contest 248）

E - K-colinear Line

https://atcoder.jp/contests/abc248/tasks/abc248_e

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