[py] Port 2021_14

py/2021/14.py

@@ -1,51 +0,0 @@
-import argparse
-from pathlib import Path
-from collections import Counter
-
-def step(pairs, rules):
-    result = Counter()
-    for pair, amount in pairs.items():
-        if pair in rules:
-            a, b = rules[pair]
-            result[a] += amount
-            result[b] += amount
-        else:
-            result[pair] += amount
-    return result
-
-def count_chars(template, pairs):
-    chars = Counter()
-    for pair, amount in pairs.items():
-        chars[pair[0]] += amount
-    chars[template[-1]] += 1
-    return chars
-
-def main():
-    parser = argparse.ArgumentParser()
-    parser.add_argument("file", type=Path)
-    args = parser.parse_args()
-
-    with open(args.file) as f:
-        template = next(f).strip()
-        next(f)
-        rules = {}
-        for line in f:
-            pair, char = line.strip().split(" -> ")
-            rules[pair] = (pair[0] + char, char + pair[1])
-
-    pairs = Counter(template[i:i+2] for i in range(len(template) - 1))
-
-    for i in range(10):
-        pairs = step(pairs, rules)
-
-    chars = count_chars(template, pairs).most_common()
-    print(f"Part 1: {chars[0][1] - chars[-1][1]}")
-
-    for i in range(30): # 40 steps total
-        pairs = step(pairs, rules)
-
-    chars = count_chars(template, pairs).most_common()
-    print(f"Part 2: {chars[0][1] - chars[-1][1]}")
-
-if __name__ == "__main__":
-    main()