Find Duplicates in Array
EasyP2Coding
Given an array of integers nums, return every value that appears at least twice, each listed once, in increasing order. Return an empty array if there are no duplicates.
Example 1
- Input
- nums = [4,3,2,7,8,2,3,1]
- Output
- [2,3]
- Why
- 2 and 3 each appear twice.
Example 2
- Input
- nums = [1,1,2]
- Output
- [1]
Example 3
- Input
- nums = [1]
- Output
- []
Constraints
- 0 <= nums.length <= 10^5
- -10^9 <= nums[i] <= 10^9
Hints
Give it a real attempt first. Run shows which examples fail.
Saved automatically
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