#include<stdio.h>
int i,j,k,mat[50][50],n,m,pat[50][50],s,v[30],ss,nn,Max;
int qq(int a)
{
	int n1;
	n1=n;
	while(v[n1]==1)
	{
		v[n1]=0;
		n1--;
	}
	v[n1]=1;
}
int main()
{
    freopen("filip.in","r",stdin);
    freopen("filip.out","w",stdout);
    scanf("%d%d",&n,&m);
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=m;j++)
        {
            scanf("%d",&mat[i][j]);
            pat[i][j]=mat[i][j];
        }
    }
    nn=n;
    while(v[1]==0)
    {
        qq(n);
    }
    printf("%d",Max);
    return 0;
}