CSU 1601(并查集)

最新推荐文章于 2018-03-30 19:57:59 发布

原创最新推荐文章于 2018-03-30 19:57:59 发布 · 392 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#并查集

本文详细介绍了如何使用C++编程语言实现网络流算法，并通过实例展示了算法的应用。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

#include<iostream>
#include<cstdio>
#include<queue>
#include<algorithm>
#include<queue>
#include<list>
#include<cstring>
#include<stack>
using namespace std;
const int N = 100001;
int v[N], r[N], a[N], f[N], t[N], tt, h[N], record[N],fa[N],number;
int n, m;
int find(int b)
{
	if (fa[b] == b)
		return b;
	fa[b] = find(fa[b]);
	return fa[b];
}
void bing(int v, int w)
{
	int vv = find(v), ww = find(w);
	if (vv != ww)
	{
		fa[vv] = ww;
		number--;
	}
}
int main()
{
	while (scanf("%d%d", &n,&m) != EOF)
	{
		number = n;
		memset(h, 0, sizeof(h));
		for (int i = 0; i <= n; i++)
			fa[i] = i;
		for (int i = 0; i < m; i++)
			scanf("%d%d", &f[i], &t[i]);
		scanf("%d", &tt);
		for (int i = 0; i < tt; i++)
			scanf("%d", &a[i]);
		for (int i = 0; i < tt; i++)
			h[a[i]-1] = 1;
		for (int i = 0; i < m;i++)
		if (!h[i])
			bing(f[i], t[i]);
		for (int i = tt - 1; i >= 0; i--)
		{
			record[i] = number;
			bing(f[a[i]-1], t[a[i]-1]);
		}
		for (int i = 0; i < tt; i++)
			printf("%d%c", record[i], " \n"[i == tt - 1]);
	}
	return 0;
}