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- #include <iostream>
- using namespace std;
- int main()
- {
- int parok;
- int szamlalo=0;
- cin>>parok;
- string evo[parok];
- string evett[parok];
- while(szamlalo<parok)
- {
- cin>>evo[szamlalo];
- cin>>evett[szamlalo];
- szamlalo++;
- }
- bool volt=false;
- string allatok[parok];
- int allatokszama=0;
- for(int i=0; i<parok; i++)
- {
- for(int j=0; j<i; j++)
- {
- if(evo[i]== evo[j])
- {
- volt=true;
- }
- if (volt)
- {
- break;
- }
- }
- if(!volt)
- {
- allatok[i] = evo[i];
- allatokszama++;
- }
- volt=false;
- }
- cout<<allatokszama <<"\n";
- for(int i =0; parok; i++)
- {
- if (allatok[i]!="")
- {
- cout<< allatok[i] +"\n";
- }
- }
- }
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