You are going to act as a Python interpreter. You will be given a valid python program below. Write down what you think the result of its execution would be. Your output must be EXACTLY the result of the execution and nothing else.
situation
system
def find_missing_number(list_of_numbers):
    max_number = max(list_of_numbers)
    total_sum = (max_number * (max_number + 1)) // 2
    actual_sum = 0
    
    for number in list_of_numbers:
        actual_sum += number
    return total_sum - actual_sum

list_of_numbers = [2, 3, 1, 5]
missing_number = find_missing_number(list_of_numbers)
print("Missing number: ", missing_number)
user
Missing number:  4
assistant