Add day10 problem + solution

day10/p1.nim

@@ -0,0 +1,47 @@
+import os
+import std/strutils
+
+template mapClosing(open: char): char =
+  case open:
+  of '(': ')'
+  of '[': ']'
+  of '{': '}'
+  of '<': '>'
+  else: '\0'
+
+template points(c: char): int =
+  case c:
+  of ')':
+    3
+  of ']':
+    57
+  of '}':
+    1197
+  of '>':
+    25137
+  else:
+    0
+
+proc main() =
+  let fileName = paramStr(1)
+
+  var points = 0
+  for line in fileName.lines:
+    var stack: seq[char]
+
+    for c in line:
+      case c:
+      of '[', '(', '{', '<':
+        stack.add(c)
+      of ']', ')', '}', '>':
+        if mapClosing(stack[^1]) == c:
+          discard stack.pop()
+        else:
+          points += c.points
+          break
+      else: discard
+
+
+  echo "Points: ", points
+
+main()