jnz just jumps to instruction, if value != 0 and after that program continues.

1. mov a 5 # a = 5
2. mov b 3 # b = 3
3. inc b # b = 4
4. dec a # a = 4
5. jnz a -2 # continue program from 3 step of program, while a != 0
6. dec a # a = 1

in result we should return {"a": 1, "b": 8}

Same problem!

I got the first test to pass but for the second I can't even figure out how that assembly code gets 409600 in any of the registers. I got 2400 doing it on paper. Help? :(

But that was probably the last time you ever forgot about regex for solving a problem :)

Same. I just wrote it in the order I thought it out though -- put the difficult part on the left, then filled in the simple part on the right. Would have changed it if I looked at it for more than a few seconds before submitting.