A13354. Add Odd or Subtract Even

You are given two positive integers $a$ and $b$ .

In one move, you can change $a$ in the following way:

- Choose any positive odd integer $x$ ( $x > 0$ ) and replace $a$ with $a+x$ ;
- choose any positive even integer $y$ ( $y > 0$ ) and replace $a$ with $a-y$ .

You can perform as many such operations as you want. You can choose the same numbers $x$ and $y$ in different moves.

Your task is to find the minimum number of moves required to obtain $b$ from $a$ . It is guaranteed that you can always obtain $b$ from $a$ .

You have to answer $t$ independent test cases.

The first line of the input contains one integer $t$ ( $1 \le t \le 10^4$ ) — the number of test cases.

Then $t$ test cases follow. Each test case is given as two space-separated integers $a$ and $b$ ( $1 \le a, b \le 10^9$ ).

For each test case, print the answer — the minimum number of moves required to obtain $b$ from $a$ if you can perform any number of moves described in the problem statement. It is guaranteed that you can always obtain $b$ from $a$ .

In the first test case, you can just add $1$ .

In the second test case, you don't need to do anything.

In the third test case, you can add $1$ two times.

In the fourth test case, you can subtract $4$ and add $1$ .

In the fifth test case, you can just subtract $6$ .