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  1. #include <unordered_map>
  2. #include <iostream>
  3. using namespace std;
  4.  
  5. int main()
  6.   {
  7.    unordered_map<unsigned,unsigned> pr;
  8.    for(unsigned i=0,v;(i<100)&&(cin>>v);++i) if(++pr[v]>1) cout<<v<<endl;
  9.    return 0;
  10.   }
Success #stdin #stdout 0s 3464KB
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https://ideone.com/USt2sV
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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