Day 11 2022

Python/2022/11/input

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+Monkey 0:
+  Starting items: 65, 58, 93, 57, 66
+  Operation: new = old * 7
+  Test: divisible by 19
+    If true: throw to monkey 6
+    If false: throw to monkey 4
+
+Monkey 1:
+  Starting items: 76, 97, 58, 72, 57, 92, 82
+  Operation: new = old + 4
+  Test: divisible by 3
+    If true: throw to monkey 7
+    If false: throw to monkey 5
+
+Monkey 2:
+  Starting items: 90, 89, 96
+  Operation: new = old * 5
+  Test: divisible by 13
+    If true: throw to monkey 5
+    If false: throw to monkey 1
+
+Monkey 3:
+  Starting items: 72, 63, 72, 99
+  Operation: new = old * old
+  Test: divisible by 17
+    If true: throw to monkey 0
+    If false: throw to monkey 4
+
+Monkey 4:
+  Starting items: 65
+  Operation: new = old + 1
+  Test: divisible by 2
+    If true: throw to monkey 6
+    If false: throw to monkey 2
+
+Monkey 5:
+  Starting items: 97, 71
+  Operation: new = old + 8
+  Test: divisible by 11
+    If true: throw to monkey 7
+    If false: throw to monkey 3
+
+Monkey 6:
+  Starting items: 83, 68, 88, 55, 87, 67
+  Operation: new = old + 2
+  Test: divisible by 5
+    If true: throw to monkey 2
+    If false: throw to monkey 1
+
+Monkey 7:
+  Starting items: 64, 81, 50, 96, 82, 53, 62, 92
+  Operation: new = old + 5
+  Test: divisible by 7
+    If true: throw to monkey 3
+    If false: throw to monkey 0

Python/2022/11/main.py

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+input = open("input", 'r')
+# input = open("sample", 'r')
+data = []
+total = 0
+
+for line in input:
+    data.append(line.strip())
+
+divisor = 1
+monkeys = []
+for line in data:
+    if len(line) <= 0:
+        continue
+    if line[0] == "M":
+        monkeys.append({})
+    else:
+        if line[0] == "S":
+            text, items = line.split(": ")
+            monkeys[-1]["items"] = [int(item) for item in items.split(", ")]
+        elif line[0] == "O":
+            formula = line.split("old ")[1]
+            op = "+" if formula[0] == "+" else "*"
+            num = formula[2:]
+            monkeys[-1]["opp"] = (op, num)
+        elif line[0] == "T":
+            monkeys[-1]["test"] = int(line.split("divisible by ")[1])
+            divisor *= monkeys[-1]["test"]
+        elif line[3] == "t":
+            monkeys[-1]["true"] = int(line.split("monkey ")[1])
+        elif line[3] == "f":
+            monkeys[-1]["false"] = int(line.split("monkey ")[1])
+
+# inspects = [0 for _ in range(len(monkeys))]
+# for r in range(20):
+#     # round
+#     for m, monkey in enumerate(monkeys):
+#         length = len(monkey["items"])
+#         inspects[m] += length
+#         for i in range(length):
+#             item = monkey["items"][0]
+#             del monkey["items"][0]
+#             value = int(monkey["opp"][1]) if monkey["opp"][1] != "old" else item
+#             if monkey["opp"][0] == "*":
+#                 item = item * value
+#             elif monkey["opp"][0] == "+":
+#                 item = item + value
+
+#             item = item // 3
+
+#             if item % monkey["test"] == 0:
+#                 monkeys[monkey["true"]]["items"].append(item)
+#             else:
+#                 monkeys[monkey["false"]]["items"].append(item)
+
+# isorted = sorted(inspects, reverse=True)
+# print(isorted[0] * isorted[1])
+
+inspects = [0 for _ in range(len(monkeys))]
+for r in range(10000):
+    # round
+    for m, monkey in enumerate(monkeys):
+        length = len(monkey["items"])
+        inspects[m] += length
+        for i in range(length):
+            item = monkey["items"][0]
+            del monkey["items"][0]
+            value = int(monkey["opp"][1]) if monkey["opp"][1] != "old" else item
+            if monkey["opp"][0] == "*":
+                item = item * value
+            elif monkey["opp"][0] == "+":
+                item = item + value
+
+            item = item % divisor
+
+            if item % monkey["test"] == 0:
+                monkeys[monkey["true"]]["items"].append(item)
+            else:
+                monkeys[monkey["false"]]["items"].append(item)
+
+isorted = sorted(inspects, reverse=True)
+print(isorted[0] * isorted[1])

Python/2022/11/sample

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+Monkey 0:
+  Starting items: 79, 98
+  Operation: new = old * 19
+  Test: divisible by 23
+    If true: throw to monkey 2
+    If false: throw to monkey 3
+
+Monkey 1:
+  Starting items: 54, 65, 75, 74
+  Operation: new = old + 6
+  Test: divisible by 19
+    If true: throw to monkey 2
+    If false: throw to monkey 0
+
+Monkey 2:
+  Starting items: 79, 60, 97
+  Operation: new = old * old
+  Test: divisible by 13
+    If true: throw to monkey 1
+    If false: throw to monkey 3
+
+Monkey 3:
+  Starting items: 74
+  Operation: new = old + 3
+  Test: divisible by 17
+    If true: throw to monkey 0
+    If false: throw to monkey 1