Problems
Complementary code - 2
Complementary code - 2
The number is given in binary complement code. Print the decimal notation of this number.
Input
One string S (2 ≤ |S| ≤ 16) that contains sequence of 0 and 1.
Output
Print the number in decimal notation .
Input example #1
00000101
Output example #1
5
Input example #2
11111011
Output example #2
-5