basic

1 minute to read

We are asked to represent 51 in base 12. This is simple:

$ python3 -q
>>> def dec_to_base(n: int, b: int) -> int:
...     digits = []
...     while n:
...         digits.append(n % b)
...         n //= b
...     return int(''.join(map(str, digits[::-1])))  
...
>>> dec_to_base(51, 12)
43
>>> 4 * 12 + 3
51

So the flag is ictf{43}.