#include <iostream>

using namespace std;

int main() {
    int a,b,c[10],i,t=0,m=7;
    for(i=1;i<=7;i++){
        cin>>a>>b;
        c[i]=a+b;
        if(c[i]>m){
            m=c[i];
            t=i;
        }
    }
    cout<<t;
    return 0;
}