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Submit/Judge
https://atcoder.jp/contests/arc167/tasks/arc167_b
Data
https://www.dropbox.com/sh/nx3tnilzqz7df8a/AAAYlTq2tiEHl5hsESw6-yfLa?dl=0
Code
https://atcoder.jp/contests/arc167/tasks/arc167_b
Comments