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AlpacaHack Round 6 (Pwn)

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TopChallengesScoreboardWriteups

inbound
128 pts (57 solves)
Pwn

by

ptr-yudai

ptr-yudai

catcpy
148 pts (41 solves)
Pwn

wall
200 pts (21 solves)
Pwn

ideabook
277 pts (10 solves)
Pwn

ideabook

277 pts (10 solves)
Pwn

by

ptr-yudai

ptr-yudai

Any idea how to solve this?

ideabook.tar.gz
descriptionsolveswriteups