Python3 Solution

def toys(weights):
        # Sort the list of weights in non-decreasing order
        weights.sort()

        # Initialize the container count
        container_count = 1

        # Set the minimum weight as the threshold
        threshold = weights[0]

        for i in range(1, len(weights)):
                # Check if the weight of current item is greater than threshold + 4
                if weights[i] > threshold + 4:
                        # Increase the container count
                        container_count += 1
                        # Update the threshold to the current item
                        threshold = weights[i]

        # Return the container count
        return container_count

-----------------> github