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Class L0077_Combinations

src/main/java/L0077_Combinations.java:22–78  ·  view source on GitHub ↗

https://leetcode.cn/problems/combinations/ 给定两个整数 n 和 k,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:[[1,2],[1,3],[1,4],[2,3],[2,4],[3,4]] 示例 2: 输入:n = 1, k = 1 输出:[[1]] 提示: - 1 <= n <= 20 - 1 <= k <= n

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