I didn't see that the check for the multiplication symbol was commented out for this test suite until I checked your solution...
Sorry about that. I added a statement that that function restriction is lifted in the problem description. Still, I'm impressed that you were able to solve it without using that function.
No worries. Multiplication without the * symbol is easy enough. There's a reason the final variable in my first solution is named "cheat" though; I had no idea how to accomplish the final check otherwise.
Well, I'll take that as a compliment, then, because your problems are clever and often stump me.
Find the longest sequence of 1's in a binary sequence.
Count up then down
Free passes for everyone!
Rounding off numbers to n decimals
Divisible by 16
Singular Value Decomposition
Divisible by 14
Divisible by n, prime vs. composite divisors
Lights Out 2 - 5x5, 4 moves
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