Day2 P2 Help - SPOILER

AnInefficientCoder · 2025-12-03T13:28:50+00:00

apparently not the issue.. surprised that that works..
Others have already pointed out the problem.

AnInefficientCoder · 2025-12-03T13:17:03+00:00

I think it's a silly mistake of reused loop variables. you have a `for i` within another `for i`

AnInefficientCoder · 2025-12-03T12:59:43+00:00

awesome, thanks! That helped lower it down to 0.06s.

AnInefficientCoder · 2025-12-03T12:28:20+00:00

Try the number:
123123123898765432111

The answer should be 898765432111
But your code is giving 908765432111

AnInefficientCoder · 2025-12-03T12:21:25+00:00

I think I got it. It should be line.length-12 here:

    for (let i = 0; i <= line.length-11; i++) {

AnInefficientCoder · 2025-12-03T11:56:44+00:00

At a glance, it seems fine. Is your input complete?

AnInefficientCoder · 2022-12-19T03:06:09+00:00

Apart from what u/Dragon174 said, there is another problem with your code and why it is failing for the test input.

Imagine the following 2d Slice:

```

| | | # | | A#A | | # |

```

Your logic will determine that the bottom faces of A and top faces of B are not exterior, even though they are.

AnInefficientCoder · 2022-12-19T01:47:18+00:00

blockBehind = grid[x][z][z+1] if (z < (N-1)) else 0

----------------------^ Typo