Solve 2021 day 10

2021/10_syntax.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+import sys
+from statistics import median
+
+CLOSE = {'(': ')', '[': ']', '{': '}', '<': '>'}
+CORRUPT = {')': 3, ']': 57, '}': 1197, '>': 25137}
+
+def complete(chunk):
+    expect = []
+    for char in chunk:
+        if char in CLOSE:
+            expect.append(CLOSE[char])
+        elif char != expect.pop():
+            return -CORRUPT[char]
+
+    score = 0
+    for char in reversed(expect):
+        score = score * 5 + ' )]}>'.index(char)
+    return score
+
+scores = [complete(line.rstrip()) for line in sys.stdin]
+print(sum(-score for score in scores if score < 0))
+print(median(score for score in scores if score > 0))

2021/input/10

@@ -0,0 +1,110 @@
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