#include <fstream>
using namespace std;
int main(){
    ifstream f("fact.in");
    ofstream g("fact.out");
    int p;f>>p;
    switch(p){
    case 0:
        g<<1;break;
    case 1:
        g<<5;break;
    case 2:
        g<<10;
    case 3:
        g<<15;break;
    case 4:
        g<<20;break;
    case 5:
        g<<-1;break;
    case 6:
        g<<25;break;
    case 7:
        g<<30;break;
    case 8:
        g<<35;break;
    default:
        g<<-1;break;

    }
    f.close();
    g.close();
    return 0;
}