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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. const int N=1e6+4;
  4. long long a[N],n;
  5. set<long long>se;
  6. int main()
  7. {
  8.     cin>>n;
  9.     for(int i=1;i<=n;i++)
  10.     {
  11.         cin>>a[i];
  12.         se.insert(a[i]);
  13.     }
  14.     cout<<se.size();
  15. }
  16.  
Success #stdin #stdout 0.01s 5444KB
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https://ideone.com/2hb9M3
language:
C++14 (gcc 8.3)
created:
1 year ago
visibility:
public

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