//By Wuzke_
#include<iostream>
using namespace std;
int a,b,max_=-1,ans;
signed main(){
	for(int i=1;i<=7;i++){
        cin>>a>>b;
        if(max_<a+b){
            max_=a+b;
            ans=i;
        }
    }
    if(max_>8) cout<<ans<<endl;
    else cout<<0<<endl;
  	return 0;
}