Find the Duplicate Number
MediumP2Coding
nums has n + 1 integers, each in the range 1..n. Exactly one value is repeated (it may appear two or more times); every other value appears once. Return the repeated value.
Do not modify nums and use only O(1) extra space.
Example 1
- Input
- nums = [1,3,4,2,2]
- Output
- 2
Example 2
- Input
- nums = [3,1,3,4,2]
- Output
- 3
Example 3
- Input
- nums = [3,3,3,3,3]
- Output
- 3
Constraints
- 2 <= nums.length <= 10^5
- 1 <= nums[i] <= nums.length - 1
- Exactly one value is repeated.
Hints
Give it a real attempt first. Run shows which examples fail.
Saved automatically
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