LeetCode 561 Array Partition I（数组划分）
翻译
原文
Given an array of 2n integers, your task is to group these integers into n pairs of integer, say (a1, b1), (a2, b2), …, (an, bn) which makes sum of min(ai, bi) for all i from 1 to n as large as possible.
Example 1:
Input: [1,4,3,2]
Output: 4
Explanation: n is 2, and the maximum sum of pairs is 4.
Note:
n is a positive integer, which is in the range of [1, 10000].
All the integers in the array will be in the range of [-10000, 10000].
代码
public int arrayPairSum(int[] nums) {Arrays.sort(nums);int sum = 0;for (int i = 0; i < nums.length; i+=2) {sum += nums[i];}return sum;}
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