Binary Search
Description
Want to play a game? As you use more of the shell, you might be interested in how they work! Binary search is a classic algorithm used to quickly find an item in a sorted list. Can you find the flag? You’ll have 1000 possibilities and only 10 guesses. Cyber security often has a huge amount of data to look through - from logs, vulnerability reports, and forensics. Practicing the fundamentals manually might help you in the future when you have to write your own tools!
Welcome to the Binary Search Game!
I'm thinking of a number between 1 and 1000.
Enter your guess: 500
Lower! Try again.
Enter your guess: 250
Higher! Try again.
Enter your guess: 375
Lower! Try again.
Enter your guess: 313
Lower! Try again.
Enter your guess: 282
Higher! Try again.
Enter your guess: 297
Lower! Try again.
Enter your guess: 289
Higher! Try again.
Enter your guess: 293
Congratulations! You guessed the correct number: 293
Here's your flag: picoCTF{g00d_gu355_2e90d29b}
Connection to atlas.picoctf.net closed.flag: picoCTF{g00d_gu355_2e90d29b}
This one was fairly easy because I was already familiar with the Binary Search Algorithm. Majoring in Computer Science finally paid off.. 😭