Coodechef Copy-Paste Problem Code: RRCOPY Solution

Solution in C++:
///**********ALLAH IS ALMIGHTY************///
///AH Tonmoy
///Department of CSE,23rd batch
///Islamic University,Bangladesh

#include<iostream>
#include<set>
using namespace std;
int main()
{
    int t,ar[100009],i,n;
    set<int>s;
    cin>>t;
    while(t--)
    {
        cin>>n;
        for(i=0;i<n;i++)
        {
            cin>>ar[i];
            s.insert(ar[i]);
        }
        cout<<s.size()<<endl;
        s.clear();
    }
}