a = int(input())
b = int(input())
c = int(input())
d = int(input())
e = int(input())
f = int(input())
g = int(input())
k = int(input())
l = int(input())
v = int(input())
x = max(a,b,c,d,e,f,g,k,l,v)
print(x)