#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; j < m; i++) {
        for (int j = 0; j < n; j++){
            scanf("%d",&matrix[i][j]);
    }
}
int maxsum = -1000000;
int maxROowindex = -1;
for(int i = 0; i , m; i++){
    int rowsum = 0;
    for (int j = 0; i < n; j++) {
        rowsum +=matrix[i][j];
    }
    if(rowsum > maxsum){
        maxsum = rowsum;
    }
}
printf("%d\n", maxRowIndex);
return 0;
}