Easy one today. And on the first day I switched to python

day_15/part2.py

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+def test(input, solution):
+    print(f"Running input {input}")
+    result = process(input)
+    print(f"Solution was {result}")
+    assert result == solution
+
+def run():
+    file = open("input.txt", "r")
+    return process(file.read()[:-1])
+
+def hash_value(word):
+    count = 0
+    for character in word:
+        count += ord(character)
+        count *= 17
+        count = count % 256
+    return count
+
+def process(input):
+    labels = []
+    focal_lengths = []
+    for _ in range(256):
+        labels.append([])
+        focal_lengths.append([])
+    words = input.split(",")
+    for word in words:
+        if word[-1] == "-":
+            label = word[:-1]
+            index = hash_value(label)
+            if label in labels[index]:
+                inner_index = labels[index].index(label)
+                labels[index].pop(inner_index)
+                focal_lengths[index].pop(inner_index)
+        else:
+            [label, focal_length] = word.split("=")
+            index = hash_value(label)
+            if label in labels[index]:
+                inner_index = labels[index].index(label)
+                focal_lengths[index][inner_index] = focal_length
+            else:
+                labels[index].append(label)
+                focal_lengths[index].append(focal_length)
+    total = 0
+    for (box_number, (label_list, focal_length_list)) in enumerate(zip(labels, focal_lengths)):
+        for (lens_number, (label, focal_length)) in enumerate(zip(label_list, focal_length_list)):
+            total += (box_number + 1) * (lens_number + 1) * int(focal_length)
+    return total