USACO-wormhole

参考：大佬 http://www.itdaan.com/blog/2017/12/24/bfe98fc214c07d61e76dbe9743aa3700.html USACO遇到的第一道磕脑壳题；html /* ID: xiao TASK: wormhole LANG: C++ */ #include <iostream> #include <fstream> #include <string>

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