#include<bits/stdc++.h>
using namespace std;
int main(){
	int a[8],b[8],c[8],mday=0,mt=8;
    for(int i=1;i<=7;i++)
	{
    	cin>>a[i]>>b[i];
    	c[i]=a[i]+b[i];
    	if(c[i]>mt)
		{
    		mt=c[i];
    		mday=i;
    	}
    	
	}   
    cout<<mday;