#include <fstream>
#include <bitset>
#include <cmath>

using namespace std;

ifstream in("fact.in");
ofstream out("fact.out");

unsigned long long pw[1000]={},n,S=0;

int main()
{
	in>>n;
	pw[1]=1;
	int i=1;
	while(pw[i]<n)
	{
		i++;
		pw[i]=pw[i-1]*5+1;
	}
	while(n>0)
	{
		if(pw[i]<=n)
		{
			n-=pw[i];
			S+=pow(5,i+0.0f);
		}
		else
			i--;
	}
	if(n>0)
	out<<S;
	else
		out<<1;
	return 0;
}