Optimized expression

Even if an expression looks complex, it may be an optimized form of a simpler expression.

Beginner Hint

• This challenge is in the Rev (Reverse Engineering) category.
• Flag checkers are a common theme in Rev problems.
• A flag checker executable or script accepts player input and tells you whether it matches the flag.
• The provided files are the ELF binary chal and the C source code chal.c.
• The goal is to find an input (the flag) that makes the binary print Correct! by analyzing the source code.