#include <fstream>
#include <iostream>
#include <vector>
#define M 1000000007
using namespace std;

///ifstream fin("zoomba.in");
///ofstream fout("zoomba.out");

int main()
{
    int n, put,r;
    char p;
    cin>>n;
    put=(1<<n);
    vector <int> g(n), d(put);
    for(int i=0;i<n;i++)
        for(int j=0;j<n;j++)
    {
        cin>>p;
        if(p=='1') g[i]|=(1<<j);

    }
    d[0]=1;
    for(int x=1;x<put;++x)
    {
        p=__builtin_popcount(x), r=0;
        for(int y=x&g[p-1]; y; y&=y-1)
        {
            r+=d[x&~(y&-y)];
            if(r>=M)r-=M;
        }
        d[x]=r;
    }
    cout<<d[put-1];
    return 0;
}