#include <iostream>
#define repeat(i,n) for (int i = 0; (i) < (n); ++(i))
#define repeat_from(i,m,n) for (int i = (m); (i) < (n); ++(i))
using namespace std;
int main() {
    int n; cin >> n;
    for (int l = 0; ; ++ l) {
        repeat (s,1<<l) {
            if (not (s & 1)) continue;
            int acc = 0;
            repeat (i,l) {
                acc += (s & (1<<i)) ? 5 : 3;
            }
            if (acc % 3 == 0) {
                n -= 1;
                if (n == 0) {
                    string t(l, '3');
                    repeat (j,l) if (s & (1<<j)) t[l-j-1] = '5';
                    cout << t << endl;
                    return 0;
                }
            }
        }
    }
}