POJ 2656

 #include<iostream>
 #include<stdio.h>

 using namespace std;

 int main()
 {
     //freopen("acm.acm","r",stdin);
     int num;
     int time;
     int ans;
     int a;
     int b;
     int max;
     while()
     {
         max = ;
         time = ;
         ans = ;
         cin>>num;
         if(num == )
             break;
         while(num --)
         {
             cin>>a;
             cin>>b;
             ++ time;
             if(a + b > max && a + b > )
             {
                 max = a + b;
                 ans = time;
             }
         }
         cout<<ans<<endl;
     }
 }