现在不MLE了，WA：30分
```cpp
//#define filreader
#include <bits/stdc++.h>
#define fp(i,l,r) for(register int i=(l);i<=(r);++i)
#define fd(i,l,r) for(register int i=(l);i>=(r);--i)
using namespace std;
const int MAXN=10001;
int fa[MAXN],n,m;
inline int stat(int n){
fp(i,1,n){
fa[i]=i;
}
return 0;
}
inline int find(int x){
if(fa[x]!=x){
fa[x]=find(fa[x]);
}
return fa[x];
}
inline int unit(int x,int y){
if(find(x)!=find(y))
fa[y]=x;
}
inline bool judg(int x,int y){
return find(x)==find(y);
}
inline int init(){
scanf("%d%d",&n,&m);
int x,y,z;
stat(n);
fp(i,1,m){
scanf("%d",&z);
if(z==1){
scanf("%d%d",&x,&y);
unit(x,y);
}
if(z==2){
scanf("%d%d",&x,&y);
if(judg(x,y)==true){
printf("Y\n");
}
else{
printf("N\n");
}
}
}
return 0;
}
int main(){
#ifdef filreader
freopen(".in","r",stdin);
freopen(".out","w",stdout);
#endif
init();
return 0;
}
```
by Fraction @ 2018-04-21 11:47:54
unit不应该是fa[fa[y]]=x吗
by AThousandSuns @ 2018-04-21 13:19:02