# PROBLEM LINK:

Practice

Contest: Division 1

Contest: Division 2

Contest: Division 3

Contest: Division 4

* Author:* notsoloud

*iceknight1093, tabr*

**Testers:***iceknight1093*

**Editorialist:**# DIFFICULTY:

TBD

# PREREQUISITES:

None

# PROBLEM:

Given the positions of Alex and Bob on the plane, find out who is standing further away from the origin.

# EXPLANATION:

The distance of point (x, y) from the origin is \sqrt{x^2 + y^2}

So, Alex’s distance from Chef is \sqrt{x_1^2 + y_1^2} and Bob’s distance is \sqrt{x_2^2 + y_2^2}.

Compute these two quantities and then compare them to find out whether they’re equal or one is larger than the other.

In order to not deal with floating-point issues, notice that it’s enough to compare (x_1^2+y_1^2) and (x_2^2+y_2^2).

# TIME COMPLEXITY:

\mathcal{O}(1) per testcase.

# CODE:

## Code (Python)

```
for _ in range(int(input())):
x1, y1, x2, y2 = map(int, input().split())
d1 = x1**2 + y1**2
d2 = x2**2 + y2**2
print('Equal' if d1 == d2 else ('Alex' if d1 > d2 else 'Bob'))
```