/**
 * 1672. Richest Customer Wealth
 * You are given an m x 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.
 *
 * Refer: 2201/220131.cpp
 */