n = input().split()
a = int(n[0])
b = int(n[1])
c = int(n[2])
d = int(n[3])
e = int(n[4])
ma = max(a, b, c, d, e)
print(ma)
/**************************************************************
	Problem: 1736
	User: admin
	Language: Python
	Result: Accepted
	Time:97 ms
	Memory:34480 kb
****************************************************************/