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  1. #include <string>
  2. #include <iostream>
  3. #include <algorithm>
  4. #include <vector>
  5. #include <sstream>
  6.  
  7. using namespace std;
  8.  
  9. struct entry {
  10.     string name;
  11.     unsigned quantity;
  12. };
  13.  
  14. vector<entry> readData()
  15. {
  16.     vector<entry> data;
  17.  
  18.     string line, name;
  19.     unsigned quantity;
  20.  
  21.     while (getline(cin, line) && istringstream(line) >> name >> quantity)
  22.         data.push_back({name,quantity});
  23.  
  24.     return data;
  25. }
  26.  
  27. void consolidate(vector<entry>& data)
  28. {
  29.     auto f = data.begin(), l = data.end();
  30.     while (f!=l)
  31.     {
  32.         auto match = find_if(begin(data), f, [&](entry const& a) { return a.name == f->name; });
  33.         if (match != f)
  34.         {
  35.             match->quantity += f->quantity;
  36.             f = data.erase(f);
  37.             l = data.end();
  38.         } else
  39.         {
  40.             f++;
  41.         }
  42.     }
  43. }
  44.  
  45. int main()
  46. {
  47.     vector<entry> data = readData();
  48.  
  49.     consolidate(data);
  50.  
  51.     for (auto it = data.begin(); it != data.end(); ++it)
  52.         cout << it->name << " " << it->quantity << "\n";
  53. }
  54.  
Success #stdin #stdout 0s 3484KB
comments (?)
stdin
copy 
apple 5
pear 2
grape 6
mangoes 3
apple 2
mangoes 9
stdout
copy 
apple 7
pear 2
grape 6
mangoes 12
https://ideone.com/pa1Ycy
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
secret

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