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Re:注意一下这题有个很奇葩的坑点...In Reply To:注意一下这题有个很奇葩的坑点... Posted by:crazyX at 2016-02-21 16:01:31 > 写并查集的find函数时,不要用递归,,会WA的,,莫名奇妙... > int find(int x){ > > // if(f[x]==x)return x; > // return f[x]==find(f[x]); > > //上面这种形式的会WA,下面两种都可以... > > // while(x!=f[x]) > // x=f[x]; > // return x; > > > int k, j, r; > r = x; > while(r != f[r]) > r = f[r]; > k = x; > while(k != r) > { > j = f[k]; > f[k] = r; > k = j; > } > return r; > } Followed by:
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