73求助！！！

#include<bits/stdc++.h>
using namespace std;
int n,a[105][2],x,y,d[105],f[105],yxy[105];
struct aaa{
	int l,r;
}b[105];
void jianshu(int k,int s){
	if(k==0||f[k]==1){
		return;
	}
	d[k]=s;
	for(int i=1;i<=n-1;i++){
		if(b[i].l==k&&!f[b[i].r]){
			if(a[k][0]!=0){
				a[k][1]=b[i].r;
			} else{
				a[k][0]=b[i].r;
			}
		}else if(b[i].r==k&&!f[b[i].l]){
			if(a[k][0]!=0){
				a[k][1]=b[i].l;
			} else{
				a[k][0]=b[i].l;
			}
		}
	}
	f[k]=1;
	jianshu(a[k][0],s+1);
	jianshu(a[k][1],s+1);
}
int main(){
	cin>>n;
	for(int i=1;i<=n-1;i++){
		cin>>b[i].l>>b[i].r;
	}
	cin>>x>>y;
	jianshu(1,0);
	int zxc=0;
	for(int i=1;i<=n;i++){
		zxc=max(zxc,d[i]+1);
		yxy[d[i]]++;
	}
	int qwe=0;
	for(int i=0;i<=n;i++){
		qwe=max(qwe,yxy[i]);
	}
	cout<<zxc<<"\n"<<qwe<<"\n"<<d[x]*2+d[y];
	return 0;
}