Score : 300 points
Given any integer x, Aoki can do the operation below.
Operation: Replace x with the absolute difference of x and K.
You are given the initial value of an integer N. Find the minimum possible value taken by N after Aoki does the operation zero or more times.
Input is given from Standard Input in the following format:
N K
Print the minimum possible value taken by N after Aoki does the operation zero or more times.
7 4
1
Initially, N=7.
After one operation, N becomes |7-4| = 3.
After two operations, N becomes |3-4| = 1, which is the minimum value taken by N.
2 6
2
N=2 after zero operations is the minimum.
1000000000000000000 1
0