n = int(input())
b = n // 100 % 10
s = n // 10 % 10
g = n // 1 % 10
if b < s:
    s, b = b, s
if s < g:
    g, s = s, g
if b < s:
    s, b = b, s
print((b * 100 + s * 10 + g) - (g * 100 + s * 10 + b))

/**************************************************************
	Problem: 1680
	User: admin
	Language: Python
	Result: Accepted
	Time:99 ms
	Memory:34480 kb
****************************************************************/