1672. Richest Customer Wealth.md

1672. Richest Customer Wealth

1. Description

You are given an m * n integer grid accounts where accounts[i][j] is the amount of money the $i^{​​​​​​​​​​​th​​​​}$ customer has in the $j^{​​​​​​​​​​​th​​​​}$ bank. Return the wealth that the richest customer has.

A customer's wealth is the amount of money they have in all their bank accounts. The richest customer is the customer that has the maximum wealth.

Example 1:

Input: accounts = [[1,2,3],[3,2,1]]
Output: 6
Explanation:
1st customer has wealth = 1 + 2 + 3 = 6
2nd customer has wealth = 3 + 2 + 1 = 6
Both customers are considered the richest with a wealth of 6 each, so return 6.

Example 2:

Input: accounts = [[1,5],[7,3],[3,5]]
Output: 10
Explanation:
1st customer has wealth = 6
2nd customer has wealth = 10
3rd customer has wealth = 8
The 2nd customer is the richest with a wealth of 10.

Example 3:

Input: accounts = [[2,8,7],[7,1,3],[1,9,5]]
Output: 17

Constraints:

• m == accounts.length
• n == accounts[i].length
• 1 <= m, n <= 50
• 1 <= accounts[i][j] <= 100

2. Solutions

Solution 1: Language: Python Python One Line Solution

• Friday, 27 August, 2021
• Time Complexity: $O(m \ times n)$
• Space Complexity: $O(m)$
• Runtime: 32 ms, faster than 94.07% of Python online submissions for Richest Customer Wealth.
• Memory Usage: 13.4 MB, less than 77.46% of Python online submissions for Richest Customer Wealth.

class Solution(object):
    def maximumWealth(self, accounts):
        """
        :type accounts: List[List[int]]
        :rtype: int
        """
        return max([sum(customer) for customer in accounts])