# 0881. Boats to Save People

https://leetcode.com/problems/boats-to-save-people

## Description

You are given an array `people` where `people[i]` is the weight of the `ith` person, and an **infinite number of boats** where each boat can carry a maximum weight of `limit`. Each boat carries at most two people at the same time, provided the sum of the weight of those people is at most `limit`.

Return _the minimum number of boats to carry every given person_.

**Example 1:**

```
**Input:** people = [1,2], limit = 3
**Output:** 1
**Explanation:** 1 boat (1, 2)
```

**Example 2:**

```
**Input:** people = [3,2,2,1], limit = 3
**Output:** 3
**Explanation:** 3 boats (1, 2), (2) and (3)
```

**Example 3:**

```
**Input:** people = [3,5,3,4], limit = 5
**Output:** 4
**Explanation:** 4 boats (3), (3), (4), (5)
```

**Constraints:**

* `1 <= people.length <= 5 * 104`
* `1 <= people[i] <= limit <= 3 * 104`

## ac

```java
```
