feat: Implement reusable number filtering function

Author: YutingLi2001

Solutions by Yuting/Solution1.py

@@ -0,0 +1,33 @@
+from typing import List
+
+def find_numbers(numbers: List[int], divisible_by: int, not_multiple_of: int) -> str:
+    """
+    Finds all numbers in the given list that are divisible by `divisible_by`
+    but not a multiple of `not_multiple_of`. Returns them as a comma-separated string.
+
+    Args:
+        numbers (List[int]): The list of numbers to check.
+        divisible_by (int): The divisor to filter numbers that are divisible.
+        not_multiple_of (int): The number that filtered numbers should not be a multiple of.
+
+    Returns:
+        str: A comma-separated string of valid numbers.
+    """
+    if not numbers:
+        return ""  # Return empty string for an empty list
+
+    # List comprehension for efficient filtering
+    valid_numbers = [str(num) for num in numbers if num % divisible_by == 0 and num % not_multiple_of != 0]
+
+    return ",".join(valid_numbers)  # Join the numbers as a single string
+
+
+if __name__ == "__main__":
+    # Define the range of numbers to check
+    numbers_range = list(range(2000, 3201))
+
+    # Set conditions: Divisible by 7 but not a multiple of 5
+    result = find_numbers(numbers_range, divisible_by=7, not_multiple_of=5)
+
+    # Print the result to standard output
+    print(result)