g0001_0100.s0077_combinations

Class Solution

java.lang.Object

g0001_0100.s0077_combinations.Solution

public class Solution
extends 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 and Description
Solution()

Method Summary

Modifier and Type	Method and Description
List<List<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 Detail

Solution

public Solution()

Method Detail

combine

public List<List<Integer>> combine(int n,
                                   int k)