Day 10.

2021/10/main.py

@@ -0,0 +1,34 @@
+openers = ['(', '[', '{', '<']
+closers = [')', ']', '}', '>']
+points = [3, 57, 1197, 25137]
+
+score = 0
+with open('data', 'r') as fp:
+    # NOTE(dev): We assume all lines are the same length
+    for line in fp:
+        stack = []
+        for ch in line.strip():
+            line_score = 0
+            if(ch in openers):
+                stack.append(ch)
+            elif(len(stack) == 0):
+                try:
+                    i = closers.index(ch)
+                    line_score += points[closers.index(ch)]
+                except ValueError: # not a closer
+                    pass
+            else:
+                try:
+                    i = closers.index(ch)
+                    last = stack[-1]
+                    stack.pop()
+                    if(last != openers[i]):
+                        line_score += points[i]
+                        score += line_score
+                        print(last, '!=', openers[i])
+                        break
+                except ValueError: # not an opener or closer!
+                    pass
+            score += line_score
+
+print(score)