#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main()
{
    int n;
    cin >> n;

    vector<int> v;

    for(int i = 1; i <= n; i++) {
        v.push_back(i);
    }

    long long sum = 0;
    do {
        int number = 0;
        for(int i = 0; i < n; i++) {
            number = (number * 10) + v[i];
        }

        sum += number;

    } while(next_permutation(v.begin(), v.end()));

    cout << sum << endl;


    return 0;
}