day20

day20.py

@@ -0,0 +1,68 @@
+from tools.aoc import AOCDay
+from typing import Any
+
+
+class Day(AOCDay):
+    inputs = [
+        [
+            (3, "input20_test"),
+            (31053880, "input20"),
+        ],
+        [
+            (117, "input20"),
+        ],
+    ]
+
+    def parse_input(self) -> list[tuple[int, int]]:
+        rules = []
+        for line in self.getInput():
+            x, y = map(int, line.split("-"))
+            rules.append((x, y))
+        return rules
+
+    def condensed_rules(self) -> list[tuple[int, int]]:
+        rules = self.parse_input()
+        found_something = True
+        while found_something:
+            found_something = False
+            new_rules = []
+            checked = set()
+            for rule in rules:
+                if rule in checked:
+                    continue
+                for sub_rule in rules:
+                    if rule == sub_rule or sub_rule in checked:
+                        continue
+                    if (
+                        rule[0] <= sub_rule[1] <= rule[1]
+                        or sub_rule[0] <= rule[1] <= sub_rule[1]
+                        or rule[1] + 1 == sub_rule[0]
+                        or sub_rule[1] + 1 == rule[0]
+                    ):
+                        new_rules.append((min(sub_rule[0], rule[0]), max(sub_rule[1], rule[1])))
+                        checked.add(sub_rule)
+                        checked.add(rule)
+                        found_something = True
+                        break
+                else:
+                    new_rules.append(rule)
+            rules = new_rules
+
+        return list(sorted(rules))
+
+    def part1(self) -> Any:
+        rules = self.condensed_rules()
+        return rules[0][1] + 1
+
+    def part2(self) -> Any:
+        ans = 0
+        rules = self.condensed_rules()
+        for i in range(len(rules) - 1):
+            ans += rules[i + 1][0] - rules[i][1] - 1
+
+        return ans
+
+
+if __name__ == "__main__":
+    day = Day(2016, 20)
+    day.run(verbose=True)

inputs/input20_test

@@ -0,0 +1,3 @@
+5-8
+0-2
+4-7