day 2 done, slightly late...

2025/02/part_1_solution.py

@@ -0,0 +1,50 @@
+testing = False
+if not testing:
+    with open(r"2025/02/input.txt", "r") as file:
+        input = file.read()
+else:
+    input = '''11-22,95-115,998-1012,1188511880-1188511890,222220-222224,1698522-1698528,446443-446449,38593856-38593862,565653-565659,824824821-824824827,2121212118-2121212124'''
+
+product_id_list = input.split(',')
+
+bad_products_list = []
+
+def is_invalid_id(id_num):
+    """
+    Check if an ID is invalid (made of some sequence repeated twice)
+    """
+    id_str = str(id_num)
+    length = len(id_str)
+    
+    # If length is odd, can't be made of two equal parts
+    if length % 2 != 0:
+        return False
+    
+    # Split into two halves and check if they're identical
+    half_length = length // 2
+    first_half = id_str[:half_length]
+    second_half = id_str[half_length:]
+    
+    return first_half == second_half
+
+
+for product_id in product_id_list:
+    # print(product_id)
+    first_id,second_id = product_id.split('-')
+    print(first_id, 'to', second_id)
+    for product in range(int(first_id), int(second_id)+1):
+        # print(product)
+        if is_invalid_id(product):
+            print(f'{product} invalid')
+            bad_products_list.append(product)
+        else:
+            pass
+            # print(f'product {product} looks valid')
+    print(bad_products_list)
+
+total_sum = 0
+
+for bad_id in bad_products_list:
+    total_sum += int(bad_id)
+
+print(total_sum)

2025/02/part_2_solution.py

@@ -0,0 +1,56 @@
+testing = False
+if not testing:
+    with open(r"2025/02/input.txt", "r") as file:
+        input = file.read()
+else:
+    input = '''11-22,95-115,998-1012,1188511880-1188511890,222220-222224,1698522-1698528,446443-446449,38593856-38593862,565653-565659,824824821-824824827,2121212118-2121212124'''
+
+product_id_list = input.split(',')
+
+bad_products_list = []
+
+def is_invalid_id(id_num):
+    """
+    Check if an ID is invalid (made of some sequence repeated at least twice)
+    """
+    id_str = str(id_num)
+    length = len(id_str)
+    
+    # Try all possible pattern lengths from 1 to half the string length
+    for pattern_length in range(1, length // 2 + 1):
+        # Check if the string can be divided evenly by this pattern length
+        if length % pattern_length == 0:
+            # Get the pattern (first part)
+            pattern = id_str[:pattern_length]
+            # Calculate how many times this pattern should repeat
+            num_repeats = length // pattern_length
+            # If it repeats at least twice, it's invalid
+            if num_repeats >= 2:
+                # Check if the entire string is made up of this pattern repeated
+                if pattern * num_repeats == id_str:
+                    return True
+    
+    return False
+
+
+for product_id in product_id_list:
+    # print(product_id)
+    first_id,second_id = product_id.split('-')
+    print(first_id, 'to', second_id)
+    for product in range(int(first_id), int(second_id)+1):
+        # print(product)
+        if is_invalid_id(product):
+            print(f'{product} invalid')
+            bad_products_list.append(product)
+        else:
+            pass
+            # print(f'product {product} looks valid')
+    print(bad_products_list)
+
+total_sum = 0
+
+for bad_id in bad_products_list:
+    total_sum += int(bad_id)
+
+print(total_sum)
+

2025/03/part_1_solution.py

@@ -0,0 +1,7 @@
+testing = True
+if not testing:
+    with open(r"2025/03/input.txt", "r") as file:
+        input = file.read()
+else:
+    input = '''
+'''