#include <stdio.h>
  
int main() {
  
    int A, B, num[7] = { '\0' };
    int max = 0;
    for (int i = 0; i < 7; i++) {
        scanf("%d %d", &A, &B);
        num[i] = A + B;
    }   //数据存入数组
    max = num[0];
    for (int i = 1; i < 7; i++) {
        if (max < num[i])
            max = num[i];
    }
    for (int i = 0; i < 7&&max>=8; i++) {
        if (max == num[i]) {
                printf("%d", i + 1);
                break;
            
        }
    }
    if (max < 8) printf("0");

    return 0;
}