Initial commit: AoC solutions 2023-2025

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Co-Authored-By: Claude <noreply@anthropic.com>

2025/day02.py

@@ -0,0 +1,52 @@
+from aoc import read_lines, read_input
+from aoc.helpers import read_lines_and_split
+
+def part1(data):
+    ids = []
+    for line in data:
+        n = line.strip().split("-")
+        r = range(int(n[0]), int(n[1]) + 1)
+        for rr in r:
+            ss = str(rr)
+            if (len(ss) % 2) == 0:
+                f = ss[:len(ss)//2]
+                s = ss[len(ss)//2:]
+                if f == s:
+                    ids.append(rr)
+    
+    return sum(ids)
+
+def find_pattern(s):
+    if len(s) < 2:
+        return False
+    n = int(s)
+    if all_same(n):
+        print(f"Found pattern: {n}")
+        return True
+    for i in range(2, len(s) // 2 + 1):
+        pattern = s[:i]
+        repeated = pattern * (len(s) // i)
+        if str(repeated) == s:
+            print(f"Found pattern: {pattern} in {s}")
+            return True 
+    return False
+        
+def all_same(n):
+    return len(set(str(n))) == 1         
+
+def part2(data):
+    ids = []    
+    for line in data:
+        n = line.strip().split("-")
+        r = range(int(n[0]), int(n[1]) + 1)
+        for rr in r:
+            ss = str(rr)
+            if find_pattern(ss):
+                ids.append(rr)
+
+    return sum(ids)
+
+if __name__ == "__main__":
+    data = read_lines_and_split(2, ",")  # or read_input(2), read_ints(2), read_grid(2)
+    print(f"Part 1: {part1(data)}")
+    print(f"Part 2: {part2(data)}")