Add solution to 2025-12-06

Author: fuglede

2025/day06/solutions.py

@@ -0,0 +1,19 @@
+from math import prod
+
+with open("input") as f:
+    *num_lines, ops_line, _ = f.read().split("\n")
+
+indices = [i for i, x in enumerate(ops_line) if x != " "]
+ops = [{"+": sum, "*": prod}[ops_line[i]] for i in indices]
+
+# Part 1
+nums1 = [
+    [line[start : end - 1] for line in num_lines]
+    for start, end in zip(indices, indices[1:] + [len(ops_line) + 1])
+]
+
+# Part 2
+nums2 = [map("".join, zip(*ns)) for ns in nums1]
+
+for nums in (nums1, nums2):
+    print(sum(op(map(int, col)) for op, col in zip(ops, nums)))