ALG-E008EasyHashing
Count Different Codes
Return the number of distinct integer values in numbers. Count each unique value once.
Contract
input numbers: integer[]
return integer
Constraints
- • 0 <= length <= 1000
Examples
Example 1
numbers = [4, 4, 2, 8, 2]
→ 3
Example 2
numbers = []
→ 0
5 judge tests (2 shown above). Target complexity: O(n) average.