#include <iostream>
using namespace std;
int main()
{
    freopen("torch.in","r",stdin);
    freopen("torch.out","w",stdout);
    int n,t;
    bool flag=true;
    cin>>n;
    for(int i=1;i<=30000;i++)
    {
        t=i*n;
        flag=true;
        while(t)
        {
            if(t%10>1)
            {
                flag=false;
                break;
            }
            t/=10;
        }
        if(flag)
        {
            cout<<i<<endl;
            return 0;
        }
    }
    cout<<"NO"<<endl;
    return 0;
}