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- #include<bits/stdc++.h>
- using namespace std;
- int main()
- {
- int n,c=0;
- cin>>n;
- int arry[n];
- for(int i=0;i<n;i++)
- {
- cin>>arry[i];
- }
- sort(arry,arry+n);
- for(int i=0;i<n;i++)
- {
- if(arry[i]==arry[i+1])
- continue;
- else
- c++;
- }
- cout<<c<<endl;
- }
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