Sometime you may lose your mind on how to operate with single bit in an integer, moreover if you are not using bit operation for a long time. This is a quick refresh to deal with single bit operation.
Given variable a type of int
To set the nth bit
a |= (1 << n)
To clear the nth bit
a &= ~(1 << n)
To toggle the nth bit
a ^= (1 << n)
To get nth bit value
a >> n & 1
