Ascii art

ringzer0ctf

Task: HTTP page shows a random ~10-digit number as 5x5 'x' ASCII-art glyphs and demands the answer within 2 seconds on the same session. Solution: a persistent requests.Session fetches the page, normalizes the HTML (&nbsp;/<br/>), slices every 5 non-blank rows into a glyph, matches a precomputed template table to digits, and immediately resubmits via /?r= to get the flag.