求助!!!

#include<bits/stdc++.h>

#define ll long long

using namespace std;

ll n,m,u,a,b,c;

int main(){

	cin>>n>>m>>a>>b;
  
	while(m--){
  
		cin>>c;
    
		int x=0,y=0;
    
		for(int j=1;j<=c;j++){
    
			int z;
      
			cin>>z;
      
			if(z==b)	x=j;
      
			if(z==a)	y=j;
      
		}
    
		if(x<y&&x&&y)	++u;
    
	}
  
	cout<<u;
  
	return 0;
  
}