#include<bits/stdc++.h>

using namespace std;
char s[105][105];
int mas[105];
int x[105];
int main(){
	freopen("student.in","r",stdin);
	freopen("student.out","w",stdout);
	int n,m,ans=0;
	cin>>n>>m;
	for(int i=0;i<n;i++){
			cin>>s[i];
	}
	for(int i=0;i<n;i++){
		for(int j=0;j<m;j++){
			int y=s[i][j]-'0';
			mas[j]=max(mas[j],y);
		}
	} 
	for(int i=0;i<n;i++){
		for(int j=0;j<m;j++){
			int y=s[i][j]-'0';
			if(y==mas[j])x[i]=1;
		}
	}
	for(int i=0;i<n;i++){
		if(x[i]==1)ans++;
	}
	cout<<ans;
}

``