Add Odd or Subtract Even

2000ms

262144K

Description:

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.

Input:

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 $$$b$$$ ($$$1 \le a, b \le 10^9$$$).

Output:

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 $$$a$$$.

Sample Input:

Sample Output:

Note:

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 $$$6$$$.

Informação

Provedor Codeforces

Código CF1311A