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561.数组拆分-i.cs
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/*
* @lc app=leetcode.cn id=561 lang=csharp
*
* [561] 数组拆分 I
*
* https://leetcode-cn.com/problems/array-partition-i/description/
*
* algorithms
* Easy (77.66%)
* Likes: 276
* Dislikes: 0
* Total Accepted: 95.9K
* Total Submissions: 123.5K
* Testcase Example: '[1,4,3,2]'
*
* 给定长度为 2n 的整数数组 nums ,你的任务是将这些数分成 n 对, 例如 (a1, b1), (a2, b2), ..., (an, bn)
* ,使得从 1 到 n 的 min(ai, bi) 总和最大。
*
* 返回该 最大总和 。
*
*
*
* 示例 1:
*
*
* 输入:nums = [1,4,3,2]
* 输出:4
* 解释:所有可能的分法(忽略元素顺序)为:
* 1. (1, 4), (2, 3) -> min(1, 4) + min(2, 3) = 1 + 2 = 3
* 2. (1, 3), (2, 4) -> min(1, 3) + min(2, 4) = 1 + 2 = 3
* 3. (1, 2), (3, 4) -> min(1, 2) + min(3, 4) = 1 + 3 = 4
* 所以最大总和为 4
*
* 示例 2:
*
*
* 输入:nums = [6,2,6,5,1,2]
* 输出:9
* 解释:最优的分法为 (2, 1), (2, 5), (6, 6). min(2, 1) + min(2, 5) + min(6, 6) = 1 + 2
* + 6 = 9
*
*
*
*
* 提示:
*
*
* 1
* nums.length == 2 * n
* -10^4
*
*
*/
// @lc code=start
public class Solution {
public int ArrayPairSum(int[] nums) {
Array.Sort(nums);
int sum = 0;
for(int i = 0; i < nums.Length - 1; i += 2) {
sum += nums[i];
}
return sum;
}
}
// @lc code=end