#include <bits/stdc++.h>
using namespace std;
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int n,m,i,j,count;
cin>>n>>m;
int arr[m],brr[n][m];
char ch;
for(i=0;i<m;i++)
arr[i]=-1;
for(i=0;i<n;i++)
{
for(j=0;j<m;j++)
{
cin>>ch;
brr[i][j]=ch-'0';
if(arr[j]<brr[i][j])
arr[j]=brr[i][j];
}
}
count=0;
for(i=0;i<n;i++)
{
for(j=0;j<m;j++)
{
if(arr[j]<=brr[i][j])
{count++;break;}
}
}
cout<<count;
return 0;
}
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