# PACTF_2017: 1597463007

Category: Points: 15 Description:

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

## Write-up

Retarded challenge, involving the fast inverse square root function of 0x5f3759df.

C solution

Therefore, the flag is 2.