n = int(input())
b = n // 100
s = n // 10 % 10
g = n // 1 % 10
if b ** 3 + s ** 3 + g ** 3 == n:
    print("YES")
else:
    print("NO")

/**************************************************************
	Problem: 1671
	User: admin
	Language: Python
	Result: Accepted
	Time:107 ms
	Memory:34244 kb
****************************************************************/