跟题解代码几乎一样了吧......为啥还是挂了,究竟哪里错了
//P1892 [BOI2003]团伙
#include<cstdio>
#include<iostream>
using namespace std;
const int N=5e3+10;
int fa[N],enemy[N],cnt;
int find(int x)
{
if(x==fa[x])return x;
return fa[x]=find(fa[x]);
}
int main()
{
freopen("P1892_2.in.txt","r",stdin);
int n,m,x,y;
cin>>n>>m;
char ch=' ';
for(int i=1;i<=n;++i)
fa[i]=i;
for(int i=1;i<=m;++i)
{
cin>>ch>>x>>y;
if(ch=='F')
{
int xx=find(x),yy=find(y);
if(xx!=yy)fa[yy]=xx;
}
else if(ch=='E')
{
int xx=find(x),yy=find(y);
if(enemy[xx]==0)enemy[xx]=yy;
else if(yy!=find(enemy[xx]))fa[find(enemy[xx])]=yy;
if(enemy[yy]==0)enemy[yy]=xx;
else if(xx!=find(enemy[yy]))fa[find(enemy[yy])]=xx;
}
}
for(int i=1;i<=n;++i)
if(find(i)==i)++cnt;
printf("%d",cnt);
return 0;
}
感谢大佬指教!