$ cat writeup.md…
$ cat writeup.md…
grodno_new_year_2026
Task: Flag split into two 14-byte halves, XORed together, then encoded through 1-20 random layers of base64/hex encoding. Solution: Iteratively detected and peeled encoding layers (18 total), then used known flag format "grodnogrodno{" and closing "}" as known plaintext to recover both halves via XOR properties.
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$sign in$ grep --similar