#include <iostream.h>

main()
{
      int g;
      float a, b, c, d, e, f;
      cout <<"Tinka skaiciuoti tik statiems trikampiams" <<"\n";
      cout <<"Iveskite trikampio krastines ilgi:"<<"\n";
      cin >>a;
      cout <<"Iveskite trikampio krastines ploti:"<<"\n";
      cin >>b;
      cout <<"Iveskite trikampio izambine:"<<"\n";
      cin >>c;
      d= a+b;
      if(d >c){
           e=(a*b)*0.5;
           f=a+b+c;
           cout <<"Trikampio plotas:" <<e<<"\n"<<"Trikampio perimetras:"<<f;
           }
           else { 
      cout <<"KLAIDA! :DDD";
      }
      cin >>g;
      return 0;
      }