标签：targe pen target continue list 题目 type for bsp
题目描述：
中文：
给定一个包含 n 个整数的数组 nums 和一个目标值 target，判断 nums 中是否存在四个元素 a，b，c 和 d ，使得 a + b + c + d 的值与 target 相等？找出所有满足条件且不重复的四元组。
英文：
Given an array nums of n integers and an integer target, are there elements a, b, c, and d in nums such that a + b + c + d = target? Find all unique quadruplets in the array which gives the sum of target.
class Solution(object): def fourSum(self, nums, target): """ :type nums: List[int] :type target: int :rtype: List[List[int]] """ nums = sorted(nums) res = [] if not nums or len(nums) < 4: return res if nums[0] + nums[1] + nums[2] + nums[3] > target: return res if nums[-1] + nums[-2] + nums[-3] + nums[-4] < target: return res for i in range(0, len(nums)): if nums[i] + nums[-1] + nums[-2] + nums[-3] < target: continue for j in range(i + 1, len(nums) - 2): if nums[i] + nums[j] + nums[-2] + nums[-1] < target: continue x = j + 1 y = len(nums) - 1 while x < y: if nums[i] + nums[j] + nums[x] + nums[y] == target: res.append([nums[i], nums[j], nums[x], nums[y]]) x = x + 1 while x < y and nums[x] == nums[x - 1]: x = x + 1 elif nums[i] + nums[j] + nums[x] + nums[y] < target: x = x + 1 else: y = y - 1 rr = [] for r in res: if r not in rr: rr.append(r) return rr
题目来源：力扣题库
标签：targe pen target continue list 题目 type for bsp
原文地址：https://www.cnblogs.com/spp666/p/11559534.html
