1597463007 - 15 points

Writeup by poortho

Problem Statement: The number 0x5f3759df is very special, it is the magic behind an otherwise rather-annoying mathematical operation. What is the result of that operation applied to 0.25?

Hint:

LMGTFY

Writeup

When we search up 0x5f3759df, we immediately see 'fast inverse square root' as the first result. Applying this operation to 0.25 results in 2, which is the flag.

Flag

2