难度:简单
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 <= n <= 104
nums.length == 2 * n
-104 <= nums[i] <= 104、
题解:
class Solution: def arrayPairSum(self, nums: List[int]) -> int: nums = sorted(nums) res = 0 final_nums = [] for i in range(0,len(nums),2): final_nums.append([nums[i],nums[i+1]]) for j in final_nums: res += min(j) return res