find函数的else分支里面改成`return f[v]`
合并函数里面改成`f[t2]=t1`
by letitdown @ 2022-07-26 16:33:44
@[slipknot](/user/543953) 您并查集错了，返回v干什么，还有根本没判断图是否连通
by Waaifu_D @ 2022-07-26 16:34:33
@[letitdown](/user/451066) @[waaifu_D](/user/358779) 感谢大佬！
by slipknot @ 2022-07-26 16:37:54