#include
using namespace std;
#define ll long long int
void dectooct( int n)
{
int r;
ll a[130000000];
int end=0;
while(n!=0)
{
r=n%8;
a[end]=r;
end++;
n=n/8;
}
for(int i=end-1;i>=0;i--){
cout<<a[i];
}
}
int main()
{
int n;
cin>>n;
dectooct(n);
return 0;
}