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  1.  
  2.  
  3.     #include<iostream>
  4.     #include<algorithm>
  5.     #include<map>
  6.     #include<vector>
  7.  
  8.     int main()
  9.     {
  10.      std::vector<std::string> most { "lion","tiger","kangaroo",
  11.                                      "donkey","lion","tiger",
  12.                                      "lion","donkey","tiger"
  13.                                      };
  14.     std::map<std::string, int> src;
  15.     for(auto x:most)
  16.         ++src[x];
  17.  
  18.     std::multimap<int,std::string,std::greater<int> > dst;
  19.  
  20.     std::transform(src.begin(), src.end(), std::inserter(dst, dst.begin()), 
  21.                        [] (const std::pair<std::string,int> &p) {
  22.                        return std::pair<int,std::string>(p.second, p.first);
  23.                        }
  24.                      );
  25.  
  26.     std::multimap<int,std::string>::iterator it = dst.begin();
  27.  
  28.      for(int count = 0;count<3 && it !=dst.end();++it,++count)
  29.        std::cout<<it->second<<":"<<it->first<<std::endl;
  30.  
  31.     }
Success #stdin #stdout 0s 3480KB
comments (?)
stdin
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Standard input is empty
stdout
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lion:3
tiger:3
donkey:2
https://ideone.com/DKFN2Q
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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