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219. 存在重复元素 II #197

@wengzc

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@wengzc

给定一个整数数组和一个整数 k,判断数组中是否存在两个不同的索引 i 和 j,使得 nums [i] = nums [j],并且 i 和 j 的差的 绝对值 至多为 k。

 

示例 1:

输入: nums = [1,2,3,1], k = 3
输出: true

示例 2:

输入: nums = [1,0,1,1], k = 1
输出: true

示例 3:

输入: nums = [1,2,3,1,2,3], k = 2
输出: false

题目链接:https://leetcode-cn.com/problems/contains-duplicate-ii

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