# 1716. Calculate Money in Leetcode Bank

<https://leetcode.com/problems/calculate-money-in-leetcode-bank>

## Description

Hercy wants to save money for his first car. He puts money in the Leetcode bank **every day**.

He starts by putting in `$1` on Monday, the first day. Every day from Tuesday to Sunday, he will put in `$1` more than the day before. On every subsequent Monday, he will put in `$1` more than the **previous Monday**.

Given `n`, return *the total amount of money he will have in the Leetcode bank at the end of the* `nth` *day.*

**Example 1:**

```
**Input:** n = 4
**Output:** 10
**Explanation:** After the 4th day, the total is 1 + 2 + 3 + 4 = 10.
```

**Example 2:**

```
**Input:** n = 10
**Output:** 37
**Explanation:** After the 10th day, the total is (1 + 2 + 3 + 4 + 5 + 6 + 7) + (2 + 3 + 4) = 37. Notice that on the 2nd Monday, Hercy only puts in $2.
```

**Example 3:**

```
**Input:** n = 20
**Output:** 96
**Explanation:** After the 20th day, the total is (1 + 2 + 3 + 4 + 5 + 6 + 7) + (2 + 3 + 4 + 5 + 6 + 7 + 8) + (3 + 4 + 5 + 6 + 7 + 8) = 96.
```

**Constraints:**

* `1 <= n <= 1000`

## ac

```java
```
