#include<iostream> 
using namespace std; 
int main(){ 
	int a,b,c; 
	cin>>a; 
	for(int i=0;i<a;i++){ 
		cin>>b;
		if((b%10)-(b/1000)-(b%1000/100)-(b%100/10)>0){
			c+=1; 
		} 
	} 
	cout<<c; 
}

#include<iostream> using namespace std; int main(){ int a,b,c; cin>>a; for(int i=0;i<a;i++){ cin>>b; if((b%10)-(b/1000)-(b%1000/100)-(b%100/10)>0){ c+=1; } } cout<<c; }