#include <iostream>

using namespace std;

int main()
{
    int c , r , sedl , ksedl;
    cin >> r >> c;
    int a[r][c];
    ksedl = 0;
    int m = 0;
    int g = 100000;
    int minstr[r];
    int maxcol[c];
    for (int i = 0; i < r;i++){
        for (int j = 0; j < c ;j++){
            cin >> a[i][j];
        }
    }
    for (int i = 0; i < r;i++){
        for (int j = 0; j < c ;j++){
            if (a[i][j] <= g){
                g = a[i][j];
            }
        }
        minstr[i] = g;
        g = 100000;
    }
    int g2 = -10000;

        for (int j = 0; j < r ;j++){
            for (int i = 0; i < c;i++){
                 if (a[i][j] >= g2){
                 g2 = a[i][j];
            }
        }
        maxcol[j] = g2;
        g2 = -10000;
    }
    for (int i = 0; i < r ;i++){
        for (int j = 0;j < c; j ++){
            if (a[i][j] == minstr[i] && a[i][j] == maxcol[j]){
                m++;
            }
        }
    }
    cout << m;
    return 0;
}