Richest Customer Wealth - Leetcode Solution

The Richest Customer Wealth problem on LeetCode is a simple array problem. The task is to find the maximum wealth among a group of customers, where the wealth of a customer is the sum of their bank account balances.

To solve this problem, you can iterate over the 2D array of bank account balances and calculate the sum of each customer's wealth. Then, you can keep track of the maximum wealth that you have seen so far and return it as the final solution.

Here is the detailed solution for the Richest Customer Wealth problem:

1. Initialize a variable max_wealth to 0.
2. Iterate over the rows of the 2D array accounts.
3. For each row, initialize a variable wealth to 0.
4. Iterate over the columns of the current row and add each balance to wealth.
5. If wealth is greater than max_wealth, update max_wealth to wealth.
6. After iterating over all rows, return max_wealth.

Here is the code implementation of the solution in Python:

class Solution:
    def maximumWealth(self, accounts: List[List[int]]) -> int:
        
        max_wealth = 0
        
        for row in accounts:
            wealth = 0
            for balance in row:
                wealth += balance
            
            max_wealth = max(max_wealth, wealth)
        
        return max_wealth

The time complexity of this solution is O(m * n), where m is the number of rows and n is the number of columns in the 2D array. The space complexity is O(1) as we only use constant extra space to keep track of max_wealth and wealth.

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