#include<stdio.h>
int main()
{
	int n1,n2,max=0,max1,i=1,day;
	for(i=1;i<8;i++)
	{
		scanf("%d%d",&n1,&n2);
		max1=n1+n2;
		if(max1>max)
		{
			max=max1;
			day=i;
		}
		printf("\n");
		
	}printf("%d",day);
	return 0; 
}