Table of Contents

### We Are Discuss About CODECHEF SOLUTION

Math1 Enrolment CodeChef Solution

## Math1 Enrolment CodeChef Solution

For the upcoming semester, the admins of your university decided to keep a total of XX seats for the `MATH-1`

course. A student interest survey was conducted by the admins and it was found that YY students were interested in taking up the `MATH-1`

course.

Find the **minimum** number of **extra** seats that the admins need to add into the `MATH-1`

course to make sure that every student who is interested in taking the course would be able to do so.

### Input Format

- The first line of input will contain a single integer TT, denoting the number of test cases.
- Each test case consists of two-space separated integers on a single line, XX and YY — the current number of seats up for enrolment and the number of students interested in taking up the course in the upcoming semester, respectively.

## Math1 Enrolment CodeChef Solution

### Output Format

For each test case, output on a new line the **minimum** number of seats required to be added.

### Constraints

- 1≤T≤1001≤T≤100
- 1≤X,Y≤1051≤X,Y≤105

### Sample Input 1

```
4
1 1
12 34
50 49
49 50
```

### Sample Output 1

```
0
22
0
1
```

### Explanation

## Math1 Enrolment CodeChef Solution

**Test case 11:** Exactly 11 seat is available for enrolment, and exactly 11 student is interested in taking up the course, hence addition of more seats is not required.

**Test case 22:** 1212 seats are available for enrolment but 3434 students are interested in taking up the course, hence the admins would have to add 34−12=2234−12=22 more seats to make sure that every student interested in the course gets a seat.

**Test case 33:** 5050 seats are available for enrolment and 4949 students are interested in taking up the course, hence addition of more seats is not required.

**Test case 44:** 4949 seats are available for enrolment, but 5050 students are interested in taking up the course, hence the admins would have to add 50−49=150−49=1 more seat to make sure that every student interested in the course gets a seat.

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