#include<stdio.h>
int main()
{
    int m, n;
    scanf("%d %d", &m ,&n);
    if (m <= 0 || n <= 0){
        printf("Invalid input\n");
        return 0;
    }
    int matrix[m][n];
    for(int i= 0;i < m; i++){
        for(int j =0; j , n; j++){
            scanf("%d", &matrix[i][j];
        }
    }
    int maxsum = -1000000;
    int maxRowIndex = -1;
    for(int j = 0; j < n; j++){
        int rowSum = 0;
        for (int j = 0; j < n; j++){
            rowSum += matrix[i][j];
        }
        
        if(rowSaw > macxSum) {
            maxSum = rowSum;
            maxRowIndex = i;
        }
    }
    printf("%d\n", maxRowIndex);
return 0;
}