class Problem0032:
	def solve(this):
		l = int(input())
		m = int(input())
		n = int(input())
		
		res = 0
		res += n % 25
		m += n // 25
		res += (m * 25) % 100 // 25
		l += (m * 25) // 100
		res += (l * 100) % 1000 // 100
		print(res)
		
if __name__ == "__main__":
	problem = Problem0032()
	problem.solve()