#include<stdio.h>
struct rowinfo
{
    int elements[100];
    int sum;
};
int main()
{
    int m,n;
    scanf("%d %d",&m,&n);
    if(m<=0||n<=0)
    {
        printf("Invalid input");
        return 0;
    }
    struct rowinfo row[n];
    for(int i=0;i<m;i++)
    {
        row[i].sum=0;
        for(int j=0;j<n;j++);
        {
            scanf("%d",&row[i].elements[j]);
            row[i].sum+=row[i].elements[j];
        }
    }
    int maxrow=0;
    int maxsum=row[0].sum;
    for(int i=0;i<m;i++)
    {
        if(row[i].sum>maxsum)
        {
            maxsum=row[i].sum;
            maxrow=i;
        }
    }
    printf("%d",maxrow);
    return 0;
}