include <stdio.h>

int main () {

int a=0,b=0,c,d,e=0; 

for (int i=1,i<=7,i++) {

scanf("%d %d",&c,&d);	
e = c+d;

if (a<e&&e>8) {

a = e;
b = i;

} }

printf("%d",b); 
return 0;

}