#include<bits/stdc++.h>
#define int long long
#define endl '\n' 
using namespace std;
int a[10000];
string s1,s2,s3,s4;
signed main(){

	int a,b,c,d,n,m,i,s=0;
	scanf("%d",&n);
	for(i=1;i<=n;++i){
		scanf("%d",&m);
		a=m/1000;
		b=(m/100)%10;
		c=(m/10)%10;
		d=m%10;
		if(d-a-b-c>0){
			s++;
		}
	}	
	printf("%d\n",s);	
	return 0;
}