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  1. #include <vector>
  2. #include <iostream>
  3. using namespace std;
  4.  
  5. int main()
  6.   {
  7.    unsigned K;
  8.    while(cin>>K)
  9.      {
  10.       vector<unsigned> tab(K);
  11.       for(unsigned k=0;k<K;++k) cin>>tab[k];
  12.       unsigned para=0; 
  13.       for(unsigned i=0;i<K;++i) for(unsigned k=i+1;k<K;++k) para+=(tab[i]==tab[k]);
  14.       cout<<para<<endl;
  15.      }
  16.    return 0;
  17.   }
Success #stdin #stdout 0s 3232KB
comments (?)
stdin
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3    9 9 9
4    9 9 9 9
5    9 9 9 9 9
6    9 9 9 9 9 9
stdout
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3
6
10
15
https://ideone.com/RpfF3l
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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