# PROBLEM LINK:

Practice

Contest: Division 1

Contest: Division 2

Contest: Division 3

Contest: Division 4

* Author:* raysh07

*sushil2006*

**Tester:***iceknight1093*

**Editorialist:**# DIFFICULTY:

Cakewalk

# PREREQUISITES:

None

# PROBLEM:

Chef is trying to buy a Diwali gift for Rs. A, and has a discount coupon worth Rs. B.

How much will Chef have to pay out of his own pocket to cover the cost?

# EXPLANATION:

If B \geq A, Chef need not pay anything.

Otherwise, Chef must pay Rs. (A-B) to cover the cost.

This can either be checked using an `if`

condition, or you can combine both cases into the expression

\max(0, A-B)

# TIME COMPLEXITY:

\mathcal{O}(1) per testcase.

# CODE:

## Editorialist's code (PyPy3)

```
a, b = map(int, input().split())
print(max(0, a-b))
```