2020 day 6 and 7

2020/d6.py

@@ -0,0 +1,24 @@
+from lib import get_data
+
+
+def part_1(data):
+    r1, r2 = 0, 0
+    for group in data.split("\n\n"):
+        r1 += len(set(group.replace("\n", "")))
+
+        s = set(group.splitlines()[0])
+        for line in group.splitlines():
+            s &= set(line)
+        r2 += len(s)
+
+    print(r1)
+    print(r2)
+
+
+def main():
+    data = get_data(__file__)
+    part_1(data)
+
+
+if __name__ == "__main__":
+    main()

2020/d7.py

@@ -0,0 +1,47 @@
+from lib import get_data
+
+
+def part_1(data):
+    bags = {}
+    for line in data.splitlines():
+        left, right = line.split(" contain ")
+        lb = " ".join(left.split()[:2])
+        rbs = right.replace(" bag", "").replace(" bags", "").replace(".", "").split(",")
+        if "no others" in rbs:
+            rbs = []
+        else:
+            rbs = [[int(v.split()[0]), " ".join(v.split()[1:])] for v in rbs]
+        assert lb not in bags
+        bags[lb] = rbs
+
+    for lb, rbs in bags.items():
+        for t in rbs:
+            if t[0] > 1:
+                t[1] = t[1][:-1]
+
+    can_hold = set(["shiny gold"])
+    can_hold_count = -1
+    while can_hold_count != len(can_hold):
+        can_hold_count = len(can_hold)
+        for lb, rbs in bags.items():
+            for _, bag_color in rbs:
+                if bag_color in can_hold:
+                    can_hold.add(lb)
+    print(len(can_hold) - 1)
+
+    def count(color):
+        r = 1  # the bag itself
+        for c, icolor in bags[color]:
+            r += c * count(icolor)
+        return r
+
+    print(count("shiny gold") - 1)
+
+
+def main():
+    data = get_data(__file__)
+    part_1(data)
+
+
+if __name__ == "__main__":
+    main()

README.md

@@ -138,7 +138,9 @@ Solutions and utility script for Advent of Code challenges in Python.
 - Day 3: 7:06  (way too slow, lol; time to take it seriously)
 - Day 4: 14:30 (yo, I am just too slow)
 - Day 5: 11:53 (not competitive)
-- Day 6:
+- Day 6: 4:11  (75th, finally on the leaderboard)
+- Day 7: 24:39 (bad)
+- Day 8:
 
 
 ## AoC 2022