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You are given an integer array nums containing positive integers. We define a function encrypt such that encrypt(x) replaces every digit in x with the largest digit in x. For example, encrypt(523) = 555 and encrypt(213) = 333.Return the sum of encrypted elements. Example 1:Input: nums = [1,2,3]Output: 6Explanation: The encrypted elements are [1,2,3]. The sum of encrypted elements is 1 + 2 + 3 == 6.Example 2:Input: nums = [10,21,31]Output: 66Explanation: The encrypted elements are [11,22,33]. The sum of encrypted elements is 11 + 22 + 33 == 66. Constraints:1 <= nums.length <= 501 <= nums[i] <= 1000

Question

You are given an integer array nums containing positive integers. We define a function encrypt such that encrypt(x) replaces every digit in x with the largest digit in x. For example, encrypt(523) = 555 and encrypt(213) = 333.Return the sum of encrypted elements. Example 1:Input: nums = [1,2,3]Output: 6Explanation: The encrypted elements are [1,2,3]. The sum of encrypted elements is 1 + 2 + 3 == 6.Example 2:Input: nums = [10,21,31]Output: 66Explanation: The encrypted elements are [11,22,33]. The sum of encrypted elements is 11 + 22 + 33 == 66. Constraints:1 <= nums.length <= 501 <= nums[i] <= 1000

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Solution

To solve this problem, you can follow these steps:

  1. Initialize a variable total_sum to 0. This will hold the sum of all encrypted elements.

  2. Iterate over each number in the nums array. For each number, do the following:

    a. Convert the number to a string to easily access each digit.

    b. Find the maximum digit in the number. You can do this by iterating over each character in the string, converting it back to an integer, and keeping track of the maximum value seen so far.

    c. Replace every digit in the number with the maximum digit. Since the number is currently a string, you can do this by creating a new string of the same length, where every character is the maximum digit.

    d. Convert the new string back to an integer, and add it to total_sum.

  3. After iterating over all numbers, total_sum will hold the sum of all encrypted elements. Return this value.

Here is a Python code snippet that implements these steps:

def sum_of_encrypted_elements(nums):
    total_sum = 0
    for num in nums:
        str_num = str(num)
        max_digit = max(int(digit) for digit in str_num)
        encrypted_num = int(str(max_digit) * len(str_num))
        total_sum += encrypted_num
    return total_sum

This function works by first converting each number to a string, which allows for easy access to each digit. It then finds the maximum digit and creates a new string where every character is this maximum digit. This new string is then converted back to an integer and added to the total sum. After all numbers have been processed, the function returns the total sum.

This problem has been solved

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