#include<stdio>

int main() {
    long long N;
    cin >> N;
    
    if (N <= 0) {
        cout << "Invalid Input";
        return 0;
    }
    
    string s = "";
    
    while (N > 0) {
        if (N % 2 == 1)
            s += '3';
        else
            s += '4';
        N = (N - 1) / 2;
    }
    
    reverse(s.begin(), s. end());
    cout << s;
    
     return 0;
}