Is this a valid solution to the Unstoppable?

[0xSecurious]

I have just started doing the CTFs, and seemingly have completed the first level. But did I really?

I have just checked the solution to the problem, and it's different.

But I did something like this: https://github.com/mskhno/damn-vulnerable-defi-solutions/blob/master/test/unstoppable/Unstoppable.t.sol

Is this valid? The test passes, but did I really find something?

For context: this is V4 of Damn Vulnerable DeFi