#include <iostream>

using namespace std;

bool div;
int main()
{
    for (unsigned int i=1; i<1000000000; i++)
    {
        div=true;
        for (int j=2; j<=20; j++)
        {
            if((i%j)!=0)
            {
                div=false;
                break;
            }
        }
        if(div)
        {
            cout << i << endl;
            break;
        }
    }
    return 0;
}