#include<stdio.h>
int main()
{
	int l, m, n;
	scanf("%d%d%d", &l, &m, &n);
	int sum = 100 * l + 25 * m + n;
	sum %= 1000;
	int ans = sum / 100;
	sum %= 100;
	ans += (sum / 25) + (sum % 25);
	printf("%d\n", ans);
	return 0;
}