Class Solution


  • public class Solution
    extends Object
    18 - 4Sum\. Medium Given an array `nums` of `n` integers, return _an array of all the **unique** quadruplets_ `[nums[a], nums[b], nums[c], nums[d]]` such that: * `0 <= a, b, c, d < n` * `a`, `b`, `c`, and `d` are **distinct**. * `nums[a] + nums[b] + nums[c] + nums[d] == target` You may return the answer in **any order**. **Example 1:** **Input:** nums = [1,0,-1,0,-2,2], target = 0 **Output:** [[-2,-1,1,2],[-2,0,0,2],[-1,0,0,1]] **Example 2:** **Input:** nums = [2,2,2,2,2], target = 8 **Output:** [[2,2,2,2]] **Constraints:** * `1 <= nums.length <= 200` * -109 <= nums[i] <= 109 * -109 <= target <= 109
    • Constructor Detail

      • Solution

        public Solution()
    • Method Detail

      • fourSum

        public List<List<Integer>> fourSum​(int[] nums,
                                           int target)