Package g0001_0100.s0018_4sum

Class Solution

java.lang.Object

g0001_0100.s0018_4sum.Solution

public class Solution
extends Object

18 - 4Sum.<p>Medium</p> <p>Given an array <code>nums</code> of <code>n</code> integers, return <em>an array of all the <strong>unique</strong> quadruplets</em> <code>[nums[a], nums[b], nums[c], nums[d]]</code> such that:</p> <ul> <li><code>0 <= a, b, c, d < n</code></li> <li><code>a</code>, <code>b</code>, <code>c</code>, and <code>d</code> are <strong>distinct</strong>.</li> <li><code>nums[a] + nums[b] + nums[c] + nums[d] == target</code></li> </ul> <p>You may return the answer in <strong>any order</strong>.</p> <p><strong>Example 1:</strong></p> <p><strong>Input:</strong> nums = [1,0,-1,0,-2,2], target = 0</p> <p><strong>Output:</strong> [[-2,-1,1,2],[-2,0,0,2],[-1,0,0,1]]</p> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> nums = [2,2,2,2,2], target = 8</p> <p><strong>Output:</strong> <a href="2,2,2,2">2,2,2,2</a></p> <p><strong>Constraints:</strong></p> <ul> <li><code>1 <= nums.length <= 200</code></li> <li><code>-10⁹ <= nums[i] <= 10⁹</code></li> <li><code>-10⁹ <= target <= 10⁹</code></li> </ul>

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
List<List<Integer>>	fourSum(int[] nums, int target)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Solution

public Solution()

Method Details

fourSum

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