1 files changed, 16 insertions, 30 deletions

diff --git a/day4/solution.nim b/day4/solution.nim
index 36e90fb..8085445 100644
--- a/day4/solution.nim
+++ b/day4/solution.nim
@@ -1,12 +1,13 @@
 import std/strutils
 import std/sequtils
+import std/sugar
 
 type
   # We use begin and length for Range representation to simplify calculations later
   Range = tuple[begin: int, length: int]
   Entry = tuple[first: Range, second: Range]
 
-proc part1(entries: seq[Entry]): int =
+proc solve(entries: seq[Entry], part2 = false): int =
   var score = 0
   for e in entries:
     var r: Entry
@@ -18,39 +19,24 @@ proc part1(entries: seq[Entry]): int =
       r.first = e.second
       r.second = e.first
 
-    if r.first.length >= r.second.length + r.second.begin - r.first.begin:
-      score += 1
-
-  return score
-
-proc part2(entries: seq[Entry]): int =
-  var score = 0
-  for e in entries:
-    var r: Entry
-    # Let first become the leftmost range. In case both ranges start at the same index, we consider the longest one to be first
-    if e.first.begin < e.second.begin or (e.first.begin == e.second.begin and e.first.length >= e.second.length):
-      r.first = e.first
-      r.second = e.second
+    if not part2:
+      if r.first.length >= r.second.length + r.second.begin - r.first.begin:
+        score += 1
     else:
-      r.first = e.second
-      r.second = e.first
-
-    if r.first.begin + r.first.length - 1 >= r.second.begin:
-      score += 1
+      if r.first.begin + r.first.length - 1 >= r.second.begin:
+        score += 1
 
   return score
 
+func entryFromLine(line: string): Entry =
+  # Get tokens and parse them as integers
+  let tokens = map(line.split({',', '-'}), token => token.parseInt())
+  # Init Entry
+  ((tokens[0], tokens[1] - tokens[0]+1), (tokens[2], tokens[3] - tokens[2]+1))
+
 let 
   content = readFile("./input.txt").strip().splitLines()
-  entries = map(
-    content,
-    proc(line: string): Entry =
-      let tokens = map(line.split({',', '-'}), proc(token: string): int = token.parseInt())
-      (
-        (tokens[0], tokens[1] - tokens[0]+1),
-        (tokens[2], tokens[3] - tokens[2]+1)
-      )
-  )
+  entries = map(content, entryFromLine)
 
-echo part1(entries)
-echo part2(entries)
+echo solve(entries)
+echo solve(entries, true)