SAISHA ASHUTOSH AND CRICKET BALLS

$Saisha$ and $Ashutosh$ are playing with $cricket$ $balls$. They have placed all $N$ balls in $ONE$ $LINE$. They have numbered the balls from $1$ to $N$. They have $two$ types of balls, 1) $White$ 2) $Black$ Initially all the balls are $BLACK$. They have a counter called $CNT$ initially set to $1$. - $Saisha$ chooses a ball $x$, and changes its colour. Then $CNT$ value is increamen