#include <bits/stdc++.h>
using namespace std;
struct cww{cww(){ios::sync_with_stdio(false);cin.tie(0);}}star;
int main()
{
	int L, M, N;
	cin >> L >> M >> N;

	int total = ( L*100 + M*25 + N ) % 1000, count{};
	while( total != 0 )
	{
		if( total >= 1000 )
		{
			total -= 1000;
		}
		else if( total >= 100 )
		{
			count++;
			total -= 100;
		}
		else if( total >= 25 )
		{
			count++;
			total -= 25;
		}
		else if( total >= 1 )
		{
			count++;
			total -= 1;
		}
	}
	cout << count << endl;
	return 0;
}