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

void conversion(int n){
	int arr[1000] = {0};
	int s = 0;
	while(n){
		int remain = n%8;
		arr[s++] = remain;
		n/=8;
	}
	for(int i = s-1; i>=0; i--){
		cout<<arr[i];
	}
}

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