[Swift]LeetCode1196. 最多可以买到的苹果数量 | How Many Apples Can You Put into the Basket
★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★
➤微信公众号：山青咏芝（let_us_code）
➤个人域名：https://www.zengqiang.org
➤GitHub地址：https://github.com/strengthen/LeetCode
➤原文地址：
➤如果链接不是山青咏芝的博客园地址，则可能是爬取作者的文章。
➤原文已修改更新！强烈建议点击原文地址阅读！支持作者！支持原创！
★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★
You have some apples, where arr[i] is the weight of the i-th apple. You also have a basket that can carry up to 5000 units of weight.
Return the maximum number of apples you can put in the basket.
Example 1:
Input: arr = [100,200,150,1000] Output: 4 Explanation: All 4 apples can be carried by the basket since their sum of weights is 1450.
Example 2:
Input: arr = [900,950,800,1000,700,800] Output: 5 Explanation: The sum of weights of the 6 apples exceeds 5000 so we choose any 5 of them.
Constraints:
1 <= arr.length <= 10^31 <= arr[i] <= 10^3
楼下水果店正在促销，你打算买些苹果，arr[i] 表示第 i 个苹果的单位重量。
你有一个购物袋，最多可以装 5000 单位重量的东西，算一算，最多可以往购物袋里装入多少苹果。
示例 1：
输入：arr = [100,200,150,1000] 输出：4 解释：所有 4 个苹果都可以装进去，因为它们的重量之和为 1450。
示例 2：
输入：arr = [900,950,800,1000,700,800] 输出：5 解释：6 个苹果的总重量超过了 5000，所以我们只能从中任选 5 个。
提示：
1 <= arr.length <= 10^31 <= arr[i] <= 10^3
52ms
1 class Solution {
2 func maxNumberOfApples(_ arr: [Int]) -> Int {
3 var arr = arr
4 arr.sort()
5 var cnt:Int = 0
6 var w:Int = 5000
7 for a in arr
8 {
9 if w >= a
10 {
11 w -= a
12 cnt += 1
13 }
14 else
15 {
16 break
17 }
18 }
19 return cnt
20 }
21 }