5. Contains Duplicate
EasyArrays & Hashing Verified judge
Given an integer array nums, return true if any value appears at least twice, and false if every element is distinct.
Example 1
Input
4 1 2 3 1
Output
true
Example 2
Input
3 1 2 3
Output
false
Input format
Input: line 1 = n, line 2 = n space-separated integers. Output: `true` or `false`.
Constraints
- 1 ≤ n ≤ 10^5
- -10^9 ≤ nums[i] ≤ 10^9
Verified judge
Expected output
true