Package g0001_0100.s0077_combinations

Class Solution

java.lang.Object
g0001_0100.s0077_combinations.Solution
public class Solution extends java.lang.Object
77 - Combinations.

Medium

Given two integers n and k, return all possible combinations of k numbers out of the range [1, n].

You may return the answer in any order.

Example 1:

Input: n = 4, k = 2

Output: [ [2,4], [3,4], [2,3], [1,2], [1,3], [1,4], ]

Example 2:

Input: n = 1, k = 1

Output: 1

Constraints:

  • 1 <= n <= 20
  • 1 <= k <= n

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    java.util.List<java.util.List<java.lang.Integer>>
    combine(int n, int k)
     

    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

    • combine

      public java.util.List<java.util.List<java.lang.Integer>> combine(int n, int k)