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# [Solution] Chef and Candies CodeChef Solution 2022

There are $N$ children and Chef wants to give them $1$ candy each. Chef already has $X$ candies with him. To buy the rest, he visits a candy shop. In the shop, packets containing exactly $4$ candies are available.

Determine the minimum number of candy packets Chef must buy so that he is able to give $1$ candy to each of the $N$ children.

### Input Format

• The first line of input will contain a single integer $T$, denoting the number of test cases.
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• The first and only line of each test case contains two integers $N$ and $X$ — the number of children and the number of candies Chef already has.

### Output Format

For each test case, output the minimum number of candy packets Chef must buy so that he is able

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to give $1$ candy to each of the $N$ children.

### Constraints

• $1\le T\le 1000$