Class Solution
java.lang.Object
g0401_0500.s0442_find_all_duplicates_in_an_array.Solution
public class Solution
extends java.lang.Object
442 - Find All Duplicates in an Array.
Medium
Given an integer array nums
of length n
where all the integers of nums
are in the range [1, n]
and each integer appears once or twice , return an array of all the integers that appears twice.
You must write an algorithm that runs in O(n)
time and uses only constant extra space.
Example 1:
Input: nums = [4,3,2,7,8,2,3,1]
Output: [2,3]
Example 2:
Input: nums = [1,1,2]
Output: [1]
Example 3:
Input: nums = [1]
Output: []
Constraints:
n == nums.length
1 <= n <= 105
1 <= nums[i] <= n
- Each element in
nums
appears once or twice.
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Constructor Summary
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Method Summary
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Constructor Details
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Solution
public Solution()
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Method Details
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findDuplicates
public java.util.List<java.lang.Integer> findDuplicates(int[] nums)
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