# Advent of Code 2023

This is my first year trying the AoC. I decided to use C because it is the
language I know the best and I am familiar with the standard library.

I did not write many comments, but if you are curious about my solutions
send me an email and I'll be happy to explain!

## Instructions

Compile with `-std=c99`. Day 6 requires also the `-lm` option to link with the
math library, that is

```
$ cc -std=c99 -lm 06/6a.c
```

My solutions read from stdin, so run the e.g. with

```
$ ./a.out <in.txt
```

## Personal times

Note: New problems come out at 6am in my time zone. At some point in
mid-December I started waking up early to try and solve the problem
before work, but I could not always do it. On the weekend of December
16-17 I was busy and I could not solve any problem at all. Regarding
day 21, I just found it very hard and could not finish it within a day.

```
      --------Part 1--------   --------Part 2--------
Day       Time   Rank  Score       Time   Rank  Score
 25   06:11:14   4908      0   06:11:45   3911      0
 24   03:00:50   3858      0   14:11:15   4807      0
 23   02:02:06   3632      0   05:26:44   3292      0
 22   00:45:32    876      0   01:02:38    853      0
 21   00:23:53   2444      0       >24h   9076      0
 20   01:47:17   3220      0   10:22:26   6402      0
 19   08:16:48  13555      0   09:44:24   8192      0
 18   14:34:39  17373      0       >24h  16383      0
 17       >24h  17185      0       >24h  16114      0
 16       >24h  26299      0       >24h  25438      0
 15   00:13:49   4618      0   00:55:28   4721      0
 14   00:16:47   2605      0   13:11:16  17486      0
 13   01:38:27   6390      0   01:45:34   4662      0
 12   00:45:36   3242      0   04:07:11   4066      0
 11   01:33:57   8963      0   01:34:56   7427      0
 10   02:58:19   9963      0   05:57:09   7684      0
  9   02:38:53  13677      0   02:40:25  13016      0
  8   00:27:21   7503      0   13:29:53  34979      0
  7   01:56:33  11510      0   02:02:06   8448      0
  6   01:53:38  16676      0   01:55:44  15724      0
  5   03:24:25  18975      0   05:14:50  10799      0
  4   03:04:29  26854      0   03:16:07  20315      0
  3   03:38:55  17900      0   03:55:42  14753      0
  2   03:44:00  24942      0   03:47:48  23122      0
  1   03:14:59  28047      0   03:25:34  16991      0