CodeChef solution IPLTRSH - IPL Ticket Rush Codechef solution in C,C++

problem Link : https://www.codechef.com/problems/IPLTRSH 

Problem

DAIICT college students want to attend an IPL match.

A total of $N$ students from the college want to go while only $M$ tickets are available for the match.

Determine how many students won't be able to book tickets.

Input Format

• 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 $N$ and $M$ — the number of students wants to go and the total number of tickets available, respectively.

Output Format

For each test case, output on a new line the number of students who won't be able to book tickets.

Constraints

Sample 1:

4
5 3
5 7
4 1
8 8

2
0
3
0

Explanation:

Test case $1$: There are $5$ students who want to go, and only $3$ tickets are available. Hence $2$ students won't be able to get tickets.

Test case $2$: There are $5$ students who want to go, and $7$ tickets are available. So, every one of them will get the tickets.

Test case $3$: There are $4$ students who want to go, and only $1$ ticket is available. Hence $3$ students won't be able to get tickets.

Test case $4$: There are $8$ students who want to go, and $8$ tickets are available. So, every one of them will get the tickets.

CodeChef solution IPLTRSH  - IPL Ticket Rush Codechef solution in C,C++