#include <bits/stdc++.h>
using namespace std;

void input(int count, vector<int> v) {

	for (int i = 0;i < count;i++)
	{
		int in;
		cin >> in;
		v.push_back(in);
	}
}

int mod(int n, int target, int current, int count)
{

	while (n % target != 0)
	{
		n -= current;
		count++;
	}
	if (target == 5)
	{
		return	mod(n, 10, 5, count);
	}
	else if (target == 10)
	{
		return	mod(n, 20, 10, count);
	}
	else if (target == 20)
	{
		return	mod(n, 100, 20, count);
	}
	else
	{
		count = count + n / 100;
		return count;
	}

}

int main()
{
	int n;
	cin >> n;
	int c = mod(n, 5, 1, 0);
	cout << c;
	return 0;
}