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 max_sum_subarray(arr):
    max_sum = None
 
    for i in range(len(arr)):
        for j in range(len(arr[i])):
            total_sum = 0
            for y in range(i, len(arr)):
                for x in range(j, len(arr[y])):
                    total_sum += arr[y][x]
 
            if max_sum is None or total_sum > max_sum:
                max_sum = total_sum
 
    return max_sum
 
arr = [[1, -2, 3], [4, 5, -6], [7, 8, 9]]
print(max_sum_subarray(arr))


user
29
assistant