## \-\-- Day 1: Not Quite Lisp \-\--

Santa was hoping for a white Christmas, but his weather machine\'s
\"snow\" function is powered by stars, and he\'s fresh out! To save
Christmas, he needs you to collect *fifty stars* by December 25th.

Collect stars by helping Santa solve puzzles. Two puzzles will be made
available on each day in the Advent calendar; the second puzzle is
unlocked when you complete the first. Each puzzle grants *one star*.
[Good
luck!]{title="Also, some puzzles contain Easter eggs like this one. Yes, I know it's not traditional to do Advent calendars for Easter."}

Here\'s an easy puzzle to warm you up.

Santa is trying to deliver presents in a large apartment building, but
he can\'t find the right floor - the directions he got are a little
confusing. He starts on the ground floor (floor `0`) and then follows
the instructions one character at a time.

An opening parenthesis, `(`, means he should go up one floor, and a
closing parenthesis, `)`, means he should go down one floor.

The apartment building is very tall, and the basement is very deep; he
will never find the top or bottom floors.

For example:

-   `(())` and `()()` both result in floor `0`.
-   `(((` and `(()(()(` both result in floor `3`.
-   `))(((((` also results in floor `3`.
-   `())` and `))(` both result in floor `-1` (the first basement
    level).
-   `)))` and `)())())` both result in floor `-3`.

To *what floor* do the instructions take Santa?

## \-\-- Part Two \-\-- {#part2}

Now, given the same instructions, find the *position* of the first
character that causes him to enter the basement (floor `-1`). The first
character in the instructions has position `1`, the second character has
position `2`, and so on.

For example:

-   `)` causes him to enter the basement at character position `1`.
-   `()())` causes him to enter the basement at character position `5`.

What is the *position* of the character that causes Santa to first enter
the basement?

Both parts of this puzzle are complete! They provide two gold stars:
\*\*

At this point, you should [return to your Advent calendar](/2015) and
try another puzzle.

If you still want to see it, you can [get your puzzle
input](1/input).