Find the Largest Customer Account Total
Company: Google
Role: Software Engineer
Category: Coding & Algorithms
Difficulty: easy
Interview Round: Other
### Problem
In matrix `accounts`, a row contains one customer’s balances across the banks. Add each customer’s balances and return the largest of those totals.
```cpp
class Solution {
public:
int maximumWealth(vector<vector<int>>& accounts);
};
```
### Examples
**Example 1:**
```text
accounts = [[2,3],[1,7],[4,2]]
Output: 8
Explanation: The row totals are 5, 8, and 6.
```
**Example 2:**
```text
accounts = [[6,1,2],[3,3,3]]
Output: 9
Explanation: Both customers have total balance 9.
```
### Constraints
- `m == accounts.length`, `n == accounts[i].length`.
- `1 <= m,n <= 50`.
- `1 <= accounts[i][j] <= 100`.
### Clarifying Questions
Return the greatest total balance, not a customer index or the greatest individual account balance.
```hint Inspect the structure
Which balances belong to the same customer, and what quantity must the function return?
```
### Reasoning checkpoints
- Sum by customer rows.
- Retain the maximum completed row total.
### Optional extensions
How would you return every customer tied for the greatest total?
Overview: Find the Largest Customer Account Total. In matrix accounts, a row contains one customer’s balances across the banks. Add each customer’s balances and return the largest of those totals.