#include <cstdio>
typedef long long ll;
using namespace std;

int main()
{
    int n;
    scanf("%d", &n);
    
    
    ll ans = 0, power = 1;
    for (int i = 0; ; ++i) {
        int add = n % 7;
        n = n / 7;
        
        ans += add * power;
        
        power *= 10;
        if (7 > n && n > 0) {
            ans += n * power;
            break;
        } else if (n == 0) {
            break;
        }
    }
    
    printf("%lld\n", ans);
    
    return 0;
}