#include<stdio.h>
int main()
{
    int m, n;
    scanf("%d %d", &m, &n);
    if(m <= 0 || n <= 0) {
        printf("Invalid input");
        return 0;
    }
    int arr[m][n];
    int maxSum = -100000, maxIndex = 0;
    for(int i = 0; i < m; i++) {
        int sum = 0;
        for(int j = 0; j < n; j++) {
            scanf("%d", &arr[i][j]);
            sum += arr[i][j];
        }
        if(Sum > maxSum) {
            maxSum = Sum;
            maxIndex = 1;
        }
    }
    printf("%d",maxIndex);
    return 0;
}