.editorconfig

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+root = true
+
+[*]
+charset = utf-8
+
+[*.nim]
+indent_style = space
+indent_size = 2

.git-crypt/.gitattributes

@@ -1,4 +0,0 @@
-# Do not edit this file.  To specify the files to encrypt, create your own
-# .gitattributes file in the directory where your files are.
-* !filter !diff
-*.gpg binary

.gitattributes

@@ -1 +0,0 @@
-session.key filter=git-crypt diff=git-crypt

.gitignore

@@ -1,7 +1,13 @@
 # binaries
 **/first
+**/first.exe
 **/second
+**/second.exe
 **/both
+**/both.exe
 
 # input files
 **/input.txt
+
+# session.key
+session.key

2023/01/both.nim

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+import
+  std/strformat,
+  std/strutils
+
+import
+  ../../adventofcode
+
+let input = adventofcode.getInput()
+var sum = 0
+
+for line in input.splitLines():
+  var digitsInLine: seq[char] = @[]
+  for i in 0 .. line.high:
+    if line[i].isDigit():
+      digitsInLine.add line[i]
+    when defined(second):
+      # We can't use multiReplace() as numbers can overlap
+      # e.g.: eighthree, twone, ...
+      proc matches(pattern: string): bool =
+        if i + pattern.high <= line.high:
+          return line[i .. i + pattern.high] == pattern
+      for (a, b) in [
+        ("one", '1'),
+        ("two", '2'),
+        ("three", '3'),
+        ("four", '4'),
+        ("five", '5'),
+        ("six", '6'),
+        ("seven", '7'),
+        ("eight", '8'),
+        ("nine", '9'),
+      ]:
+        if matches a:
+          digitsInLine.add b
+
+  # Take the first and the last digits of the current line
+  sum += parseInt(digitsInLine[0] & digitsInLine[^1])
+
+echo fmt"Answer: {sum}"

2023/02/first.nim

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+import
+  std/strformat,
+  std/strutils
+
+import
+  ../../adventofcode
+
+const maxRedCubes = 12
+const maxGreenCubes = 13
+const maxBlueCubes = 14
+
+let input = adventofcode.getInput()
+var sum = 0
+
+for line in input.splitLines():
+  let colonIdx = line.find(':')
+  let gameID = parseInt line[len("Game ") ..< colonIdx]
+  let gameSets = line[colonIdx + 2 .. ^1].split("; ")
+  block verifyGameSet:
+    for gameSet in gameSets:
+      for cubeTypeAndCount in gameSet.split(", "):
+        let cubeCountAndTypeSplit = cubeTypeAndCount.split(' ')
+        let cubeCount = parseInt cubeCountAndTypeSplit[0]
+        let cubeType = cubeCountAndTypeSplit[1]
+        case cubeType:
+          of "red":
+            if cubeCount > maxRedCubes:
+              break verifyGameSet
+          of "green":
+            if cubeCount > maxGreenCubes:
+              break verifyGameSet
+          of "blue":
+            if cubeCount > maxBlueCubes:
+              break verifyGameSet
+          else:
+            discard
+    sum += gameID
+
+echo fmt"Answer: {sum}"

session.example.key

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+Rename this file to `session.key` and put your session key in it.