#include <iostream>
using namespace std;

int main() {
    int convenient_numbers[65] = {
        1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
        12, 13, 15, 16, 18, 21, 22, 24, 25, 28,
        30, 33, 37, 40, 42, 45, 48, 57, 58, 60,
        70, 72, 78, 85, 88, 93, 102, 105, 112, 120,
        130, 133, 165, 168, 177, 190, 210, 232, 240, 253,
        273, 280, 312, 330, 345, 357, 385, 408, 462, 520,
        760, 840, 1320, 1365, 1848
    };

    int k;
    cin >> k;
    if (k >= 1 && k <= 65) 
	{
        cout << convenient_numbers[k - 1] << endl;
    }
    return 0;
}