#include<stdio.h>
#include<malloc.h>
int main(){
	int arr[2][7];
	int j;
	for(j=0;j<7;j++){
		scanf("%d %d",&arr[0][j],&arr[1][j]);
	}
	int most = 0;
	int*temp = (int*)malloc(sizeof(int));
	for(j=0;j<7;j++){
		if(arr[0][j]+arr[1][j]>most){
			most = arr[0][j]+arr[1][j];
			*temp = j+1;
		}
	}
	printf("%d",*temp);
	return 0;
}