#include <stdio.h>

int main(void)
{
	int l, m, n;
	scanf("%d", &l);
	scanf("%d", &m);
	scanf("%d", &n);
	int x;
	if (n >= 25) {
		x = n / 25;
		m += x;
		n = n % 25;
	}
	if (m >= 4) {
		x = m / 4;
		l += x;
		m = m % 4;
	}
	if (l >= 10) l = l % 10;
	printf("%d\n", l + m + n);
	return 0;
}