#include <bits/stdc++.h>
using namespace std;
typedef unsigned long long ull;
int main() {
    string str;
    cin >> str;
    ull rez = 0, n = str.length();
    for(ull i = 0; i < (1<<(n-1)); ++i) {
        ull s = 0;
        for(int j = 0; j < n; ++j) {
            s *= 10;
            s += str[j] - '0';
            if((i & (1<<j)) > 0 )  {
                rez += s;
                s = 0;
            }
        }
        rez += s;
    }
    cout << rez << endl;
}