#include <stdio.h>

int main()
{
	enum Ryougae
	{
		ICHI = 25,
		NIJUGO = 4,
		HYAKU = 10,
	};
	int n = 0;
	int x = 0;
	int y = 0;
	scanf("%d", &n);
	scanf("%d", &x);
	scanf("%d", &y);

	while (y >= ICHI)
	{
		x++;
		y -= ICHI;
	}

	while (x >= NIJUGO)
	{
		n++;
		y -= NIJUGO;
	}

	while (n >= HYAKU)
	{
		n--;
	}

	printf("%d", n + x + y);

	return 0;
}