Friends

I made a really complicated math function. Check it out.

nc chall.csivit.com 30425

Files

• namo.py

Solution

• Go through the given source code to realize that the input entered goes through a set of manipulations
• And to get the flag, the result of manipulations should not be equal to the input number
• It can also be seen that the input should be between 3 and 100
• Running the code locally with different inputs tells us that there is no way to meet the necessary conditions to get the flag by entering a number
• One interesting thing to note is that the input lands inside float()
  

x = round(float(input()), 0)

• Reading up on float(), we realize that it takes nan as input
• Using nan as input, we meet the necessary conditions and namo.txt is obtained
• namo.txt is basically a conditional statement-expanded-code-snippet of the flag written in namo
• Flag can be obtained by parsing the file

Response File
namo.txt

Solution File
8pm.sh

Flag

csictf{my_n4n_15_4_gr34t_c00k}