Card Game

There is a set of $N$ cards where each card is numbered $1$ to $N$. Chef throws a card numbered $X$. Find the number of ways, Chefina can chose a card from the remaining deck such that, the sum of chosen card and $X$ is **even**. ### Input - The first line of input will contain a single integer $T$, denoting the number of test cases. - Each test case consists of two space-separated integers $