#include <iostream>
using namespace std;
void read(int &q,int &b,int &s,int &g){
    getchar();
    q=getchar()-'0';
    b=getchar()-'0';
    s=getchar()-'0';
    g=getchar()-'0';
}
int main() {
    int n,sum=0,q,b,s,g,num;
    cin>>n;
    for(int i=0;i<n;i++){
        read(q,b,s,g);
        num=g-q-b-s;
        if(num>0)sum++;
    }
    cout<<sum;
    return 0;
}