AtCoder Beginner Contest 262

E - Red and Blue Graph

https://atcoder.jp/contests/abc262/tasks/abc262_e

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AtCoder Beginner Contest 262

D - I Hate Non-integer Number

https://atcoder.jp/contests/abc262/tasks/abc262_d

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AtCoder Regular Contest 144

C - K Derangement

https://atcoder.jp/contests/arc144/tasks/arc144_c

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AtCoder Regular Contest 144

B - Gift Tax

https://atcoder.jp/contests/arc144/tasks/arc144_b

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NOMURA Programming Contest 2022（AtCoder Beginner Contest 253）

F - Operations on a Matrix

https://atcoder.jp/contests/abc253/tasks/abc253_f

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NOMURA Programming Contest 2022（AtCoder Beginner Contest 253）

E - Distance Sequence

https://atcoder.jp/contests/abc253/tasks/abc253_e

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