# PROBLEM LINK:

Practice

Contest: Division 1

Contest: Division 2

Contest: Division 3

Contest: Division 4

* Author:* notsoloud

*abhidot*

**Tester:***iceknight1093*

**Editorialist:**# DIFFICULTY:

305

# PREREQUISITES:

None

# PROBLEM:

Chef earned X rupees and Chefina earned Y rupees. It is known that X \lt Y.

The difference between their incomes is donated to charity. How much is donated?

# EXPLANATION:

The difference between their incomes is exactly Y - X, and hence this is the answer.

# TIME COMPLEXITY

\mathcal{O}(1) per test case.

# CODE:

## Editorialist's code (Python)

```
for _ in range(int(input())):
x, y = map(int, input().split())
print(y - x)
```