re-tle:
博客地址：https://www.cnblogs.com/re-tle/
re-tle:
博客地址：https://www.cnblogs.com/re-tle/
Codeforces Round #617 (Div. 3) C. Yet Another Walking Robot
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Codeforces Round #617 (Div. 3) E1. String Coloring (easy version)