#include <stdio.h>

int bank(int l,int m,int n)
{
	int count = 0;
	
	m += l/25; n %= 25;
	l += m/4;  m %= 4;
	l %= 10;
	count = l + m + n;
	
	return count;
}

int main(void)
{
	int l,m,n;
	
	scanf("%d%d%d",&l,&m,&n);
	
	printf("%d\n",bank(l,m,n));
	
	return 0;
}