[code:lit]s = 1 + 2 + 4 + 8 + ...
= 1 + 2 * (1 + 2 + 4 + 8 + ...)
= 1 + s
s = 1 + 2 * s
s = -1
1 + 2 + 4 + 8 + ... = -1[/code:lit]
= 1 + 2 * (1 + 2 + 4 + 8 + ...)
= 1 + s
s = 1 + 2 * s
s = -1
1 + 2 + 4 + 8 + ... = -1[/code:lit]
