OVERVIEW
challenge link - https://play.picoctf.org/practice/challenge/442
difficulty level - easy
SOLUTION
just try to guess the number by taking large jumps like below
~/ctf ❯ ssh -p 61310 ctf-player@atlas.picoctf.net 7m 23s 22:19:34 ctf-player@atlas.picoctf.net's password: Permission denied, please try again. ctf-player@atlas.picoctf.net's password: Welcome to the Binary Search Game! I'm thinking of a number between 1 and 1000. Enter your guess: 500 Higher! Try again. Enter your guess: 750 Lower! Try again. Enter your guess: 625 Lower! Try again. Enter your guess: 550 Lower! Try again. Enter your guess: 525 Lower! Try again. Enter your guess: 515 Higher! Try again. Enter your guess: 520 Higher! Try again. Enter your guess: 522 Higher! Try again. Enter your guess: 523 Higher! Try again. Enter your guess: 524 Congratulations! You guessed the correct number: 524 Here's your flag: picoCTF{g00d_gu355_ee8225d0} Connection to atlas.picoctf.net closed. FLAG
picoCTF{g00d_gu355_ee8225d0}
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