day24

day24.py

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+from tools.aoc import AOCDay
+from typing import Any
+
+
+def get_max_bridge_strength(bridge_parts: list, connect_to: int) -> int:
+    max_strength = 0
+
+    for part in bridge_parts:
+        if connect_to not in part:
+            continue
+
+        sub_parts = bridge_parts.copy()
+        sub_parts.remove(part)
+        this_strength = sum(part) + get_max_bridge_strength(sub_parts, part[int(not part.index(connect_to))])
+        max_strength = max(max_strength, this_strength)
+
+    return max_strength
+
+
+def get_possible_bridges(bridge_parts: list, connect_to: int) -> list:
+    bridges = []
+    for part in bridge_parts:
+        if connect_to not in part:
+            continue
+
+        sub_parts = bridge_parts.copy()
+        sub_parts.remove(part)
+        bridges.append([part])
+        sub_bridges = get_possible_bridges(sub_parts, part[int(not part.index(connect_to))])
+        for sub_bridge in sub_bridges:
+            bridges.append([part] + sub_bridge)
+
+    return bridges
+
+
+class Day(AOCDay):
+    inputs = [
+        [
+            (31, "input24_test"),
+            (1940, "input24")
+        ],
+        [
+            (19, "input24_test"),
+            (1928, "input24")
+        ]
+    ]
+
+    def get_bridge_parts(self) -> list:
+        return [
+            list(map(int, line.split("/")))
+            for line in self.getInput()
+        ]
+
+    def part1(self) -> Any:
+        return get_max_bridge_strength(self.get_bridge_parts(), 0)
+
+    def part2(self) -> Any:
+        bridges = get_possible_bridges(self.get_bridge_parts(), 0)
+        max_length = max(map(len, bridges))
+        return max(sum(sum(x) for x in b) for b in bridges if len(b) == max_length)
+
+
+if __name__ == '__main__':
+    day = Day(2017, 24)
+    day.run(verbose=True)

inputs/input24

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+42/37
+28/28
+29/25
+45/8
+35/23
+49/20
+44/4
+15/33
+14/19
+31/44
+39/14
+25/17
+34/34
+38/42
+8/42
+15/28
+0/7
+49/12
+18/36
+45/45
+28/7
+30/43
+23/41
+0/35
+18/9
+3/31
+20/31
+10/40
+0/22
+1/23
+20/47
+38/36
+15/8
+34/32
+30/30
+30/44
+19/28
+46/15
+34/50
+40/20
+27/39
+3/14
+43/45
+50/42
+1/33
+6/39
+46/44
+22/35
+15/20
+43/31
+23/23
+19/27
+47/15
+43/43
+25/36
+26/38
+1/10

inputs/input24_test

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+0/2
+2/2
+2/3
+3/4
+3/5
+0/1
+10/1
+9/10