#include <stdio.h>

int main()
{
	int l, m, n;
	scanf("%d", &l);
	scanf("%d", &m);
	scanf("%d", &n);

	int s = l*100 + m*25 + n;

	int a = 0;

	while (s > 0)
	{
		if (s >= 1000)
		{
			s -= 1000;
			continue;
		}

		if (s >= 100)
		{
			s -= 100;
			a++;
			continue;
		}

		if (s >= 25)
		{
			s -= 25;
			a++;
			continue;
		}

		s -= 1;
		a++;
	}

	printf("%d", a);

	return 0;
}