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package leetcode;

import java.util.HashMap;

/**

* Project Name : Leetcode

* Package Name : leetcode

* File Name : ContainsDuplicateII

* Creator : Edward

* Date : Oct, 2017

* Description : 219. Contains Duplicate II

*/

public class ContainsDuplicateII {

//time : O(n) space : O(n)

public boolean containsNearbyDuplicate(int[] nums, int k) {

HashMap<Integer, Integer> map = new HashMap<>();

for (int i = 0; i < nums.length; i++) {

if (map.containsKey(nums[i])) {

if ((i - map.get(nums[i])) <= k) {

return true;

}

}

map.put(nums[i], i);

}

return false;

}

}