## GUPTA MECHANICAL

IN THIS WEBSITE I CAN TELL ALL ABOUT TECH. TIPS AND TRICKS APP REVIEWS AND UNBOXINGS ALSO TECH. NEWS .............

## [Solution] Whatsapp Messages CodeChef Solution | CodeChef Problem Solution 2022

Chef recently installed Whatsapp on his mobile device. Currently, he has no unread messages.

Every hour, he receives $X$ messages and he is able to read $Y$ messages out of them. After some time Chef notices that he has several unread messages.

Can you tell him exactly how many unread messages Chef has after $Z$ hours have passed?

### Input Format

• The first line of input will contain a single integer $T$, denoting the number of test cases. The description of the test cases follows.
• Each test case consists of a single line containing three space-separated integers $X,Y,$ and Z\$, denoting the number of messages Chef receives every hour, the number \

• of messages he reads every hour, the and number of hours that have passed, respectively.

### Output Format

• For each test case, output on a new line a single integer denoting the number of unread messages after $Z$ hours.

### Constraints

• $1\le T\le 2\cdot {10}^{4}$
• $1\le Y\le X\le 50$