#include<cstdio>
#include<iostream>
#include<cstring>
#include<vector>
using namespace std;

int g[1001];
int e[1001];
int n,m;

int find(int i)
{
	return g[i]==i?i:g[i]=find(g[i]);
}

int main()
{
	scanf("%d%d\n",&n,&m);
	for(int i = 1;i <= n;++i)g[i]=i;
	char c;
	int p,q;
	for(int i = 1; i < m;++i)
	{
		scanf("%c%d%d\n",&c,&p,&q);
		if(c=='F')
		{
			int x = find(p);
			int y = find(q);
			g[x]=y;
		}
		else
		{
			if(e[p])
			{
				g[find(e[p])]=find(q);
			}
			else
			{
				e[p]=q;
			}
			if(e[q])
			{
				g[find(e[q])]=find(p);
			}
			else
			{
				e[q]=p;
			}
		}
	}
	scanf("%c%d%d",&c,&p,&q);
	if(c=='F')
	{
		int x = find(p);
		int y = find(q);
		g[x]=y;
	}
	else
	{
		if(e[p])
			{
				g[find(e[p])]=find(q);
			}
			else
			{
				e[p]=q;
			}
			if(e[q])
			{
				g[find(e[q])]=find(p);
			}
			else
			{
				e[q]=p;
			}
	}
	
	int ans(0);
	for(int i = 1;i <= n;++i)
	{
		if(find(i)==i) ++ans;
	}
	cout << ans;
	return 0;
}

以上是郭神的代码。。不忍吐槽。。

以下是我的↓

#include<cstdio>
#include<iostream>
#include<cstring>
using namespace std;
int n,m;
int fa[1001],f[1001];
int find(int t)
{
	if(fa[t]==t)return t;
	return fa[t]=find(fa[t]);
}
int main()
{
	scanf("%d %d",&n,&m);
	for(int i=1;i<=n;i++)fa[i]=i;
	char c;
	int x,y;
	for(int i=1;i<=m;i++)
	{	
		scanf("\n %c%d%d",&c,&x,&y);
		if(c == 'F')
		{
			int fx = find(x);
			int fy = find(y);
			if(fx!=fy)fa[fy]=fx;
		}
		else
		{
			if(f[x])
				fa[find(f[x])]=find(y);
			else
				f[x]=y;
			if(f[y])
				fa[find(f[y])]=find(x);
			else
				f[y]=x;
		}
	}
	int ans=0;
	for(int i=1;i<=n;i++)
	{
		if(find(i) == i)ans++;
	}
	printf("%d",ans);
	return 0;
}