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我觉得这道题的重边不算是两条seprate road 因为经过的都是一样的但是 对于这组数据 2 2 1 2 2 1 我的答案是1 但也有人的答案是0也能AC 随意选一种思路吧 过了就行 (我直接在输入就把重边判掉了） Followed by:
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