#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;

}