Distinct absolute array elements

#include<bits/stdc++.h> using namespace std; int main() { int arr[]={-3, -2, 0, 3, 4, 5}; int n=6; unordered_set<int>us; int count=0; for(int i=0;i<n;i++) { us.insert(abs(arr[i])); } cout<<us.size(); return 0; }