#include<stdio.h>
int main() {
    int m, n;
    scanf("%d %d", &m, &n);
    if(m <= 0 || n <= 0) {
        printf("Invalid input");
        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 matrix = -100000;
    int maxrowindex = 0;
    for( int i = 0; i<m; i++) {
        int rowsum = 0;
        for (int j = 0; j < n; j++) {
        rowsum += matrix[i][j];
    }
    if (rowsum > maxsum) {
        maxsum = rowsum;
        maxrowindex = i;
       }
    }printf("%d",maxrowindex);
    return 0;
    }