#include <cstdio>

using namespace std;

int main()

{

double a,b,time,day,maxtime,maxday;

maxday=0;

maxtime=8;

for (day=1;day<8;day++)

{

scanf("%lf%lf",&a,&b);

time=a+b;

if (time>maxtime)

{

maxtime=time;maxday=day;

}

}

printf("%0.0lf\n",maxday);

return 0;

}