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- #include<bits/stdc++.h>
- //#include<set>
- using namespace std;
- int main()
- {
- int t,p=0;
- cin>>t;
- while(t--)
- {
- int n;
- set<long long int>s;
- long long int d;
- scanf("%d",&n);
- for(int i=0;i<n;i++)
- {
- scanf("%lld",&d);
- s.insert(d);
- }
- cout<<"Case "<<++p<<": "<<s.size()<<endl;
- }
- return 0;
- }
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