Ren Baoshuo 7896bca156 B - Star or Not ... https://atcoder.jp/contests/abc225/submissions/26898727		2021-10-30 20:12:18 +08:00
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A	A - Distinct Strings	2021-10-30 20:07:24 +08:00
B	B - Star or Not	2021-10-30 20:12:18 +08:00