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这题WA的我无地自容,现在列出我犯的错误,以此警戒后人一、边是有向的; 二、数据是不止一个的; 三、初值是要重新赋的; 四、BFS的判重数组是要刷的…… 今天晚上被月亮照晕了…… Followed by:
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