topic77

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Published: Aug 9, 2023 License: GPL-3.0 Imports: 0 Imported by: 0

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77.组合

1. 题目描述

给定两个整数 nk ,返回范围 [1, n] 中所有可能的 k 个数的组合。

你可以按 任何顺序 返回答案。

 

示例 1:


输入:n = 4, k = 2
输出:
[
  [2,4],
  [3,4],
  [2,3],
  [1,2],
  [1,3],
  [1,4],
]

示例 2:


输入:n = 1, k = 1
输出:[[1]]

 

提示:

  • 1 <= n <= 20
  • 1 <= k <= n

标签 回溯

2. 解题

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