@[dishangti](/space/show?uid=116683) 您确定不是并查集写错了？
by WA鸭鸭 @ 2019-02-05 20:13:09
@[dishangti](/space/show?uid=116683) 查询函数
by WA鸭鸭 @ 2019-02-05 20:13:19
@[WA鸭鸭](/space/show?uid=93249) 应该不会吧我去掉就AC了
```cpp
#include <iostream>
using namespace std;
int father[10010];
int n, m;
int getf(int x)
{
if (father[x]) return father[x] = getf(father[x]);
return x;
}
void merge(int x, int y)
{
int fx, fy;
fx = getf(x); fy = getf(y);
if (fx == fy) return;
father[fy] = fx;
}
int main()
{
cin >> n >> m;
for (int i = 1; i <= m; i++) {
int z, x, y;
cin >> z >> x >> y;
if (z == 1) merge(x, y);
else {
if (getf(x) == getf(y)) cout << 'Y' << endl;
else cout << 'N' << endl;
}
}
}
```
by 低熵体 @ 2019-02-05 20:21:53
@[WA鸭鸭](/space/show?uid=93249) 哦哦知道了傻了，我试了不初始化自己为自己爹忘记了
by 低熵体 @ 2019-02-05 20:25:33
@[dishangti](/space/show?uid=116683) if (father[x])是啥qwq
by WA鸭鸭 @ 2019-02-05 20:27:50
@[dishangti](/space/show?uid=116683) 我都是写的if(father[x]!=x)
by WA鸭鸭 @ 2019-02-05 20:28:11
@[dishangti](/space/show?uid=116683) 没事，我也经常忘记初始化
by WA鸭鸭 @ 2019-02-05 20:28:26