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Detalii evaluare #48878904

Rezumat problemă

#2160 Prize

Am câștigat un concurs și primim la școală foarte foarte multe echipamente pentru un nou laborator. Pentru amenajarea laboratorului am primit și o sală de clasă. Din păcate în sala de clasă există doar o singură priză, în care ar putea fi conectat doar un singur echipament. Cum nu putem reface imediat instalația electrică, am hotărât să utilizăm prelungitoare.

Un prelungitor poate avea una sau mai multe prize în care pot fi conectate echipamente și eventual alte prelungitoare. Evident, pentru ca prelungitorul să poată fi utilizat el trebuie să fie alimentat la curentul electric.

Cunoscând configurația prelungitoarelor să se determine numărul maxim de echipamente ce pot fi alimentate la curentul electric.

OMI Iasi 2014

Rezolvă

Detalii

Problema Prize Operații I/O prize.in/prize.out
Limita timp 0.2 secunde Limita memorie Total: 2 MB / Stivă 1 MB
Id soluție #48878904 Utilizator mirel P (mirel_P)
Fișier prize.cpp Dimensiune 300 B
Data încărcării 08 Februarie 2024, 09:39 Scor / rezultat Eroare de compilare

Evaluare


Mesaj compilare

prize.cpp: In function 'int main()':
prize.cpp:18:9: error: no match for 'operator<<' (operand types are 'std::ifstream {aka std::basic_ifstream<char>}' and 'int')
     fout<< s - (n - 1) << "\n";

         ^
prize.cpp:18:9: note: candidates are:
In file included from /usr/include/c++/4.8/string:52:0,
                 from /usr/include/c++/4.8/bits/locale_classes.h:40,
                 from /usr/include/c++/4.8/bits/ios_base.h:41,
                 from /usr/include/c++/4.8/ios:42,
                 from /usr/include/c++/4.8/istream:38,
                 from /usr/include/c++/4.8/fstream:38,
                 from prize.cpp:1:
/usr/include/c++/4.8/bits/basic_string.h:2753:5: note: template<class _CharT, class _Traits, class _Alloc> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::basic_string<_CharT, _Traits, _Alloc>&)
     operator<<(basic_ostream<_CharT, _Traits>& __os,
     ^
/usr/include/c++/4.8/bits/basic_string.h:2753:5: note:   template argument deduction/substitution failed:
prize.cpp:18:22: note:   'std::ifstream {aka std::basic_ifstream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     fout<< s - (n - 1) << "\n";

                      ^
In file included from /usr/include/c++/4.8/istream:39:0,
                 from /usr/include/c++/4.8/fstream:38,
                 from prize.cpp:1:
/usr/include/c++/4.8/ostream:471:5: note: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, _CharT)
     operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c)
     ^
/usr/include/c++/4.8/ostream:471:5: note:   template argument deduction/substitution failed:
prize.cpp:18:22: note:   'std::ifstream {aka std::basic_ifstream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     fout<< s - (n - 1) << "\n";

                      ^
In file included from /usr/include/c++/4.8/istream:39:0,
                 from /usr/include/c++/4.8/fstream:38,
                 from prize.cpp:1:
/usr/include/c++/4.8/ostream:476:5: note: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, char)
     operator<<(basic_ostream<_CharT, _Traits>& __out, char __c)
     ^
/usr/include/c++/4.8/ostream:476:5: note:   template argument deduction/substitution failed:
prize.cpp:18:22: note:   'std::ifstream {aka std::basic_ifstream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     fout<< s - (n - 1) << "\n";

                      ^
In file included from /usr/include/c++/4.8/istream:39:0,
                 from /usr/include/c++/4.8/fstream:38,
                 from prize.cpp:1:
/usr/include/c++/4.8/ostream:482:5: note: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, char)
     operator<<(basic_ostream<char, _Traits>& __out, char __c)
     ^
/usr/include/c++/4.8/ostream:482:5: note:   template argument deduction/substitution failed:
prize.cpp:18:22: note:   'std::ifstream {aka std::basic_ifstream<char>}' is not derived from 'std::basic_ostream<char, _Traits>'
     fout<< s - (n - 1) << "\n";

                      ^
In file included from /usr/include/c++/4.8/istream:39:0,
                 from /usr/include/c++/4.8/fstream:38,
                 from prize.cpp:1:
/usr/include/c++/4.8/ostream:488:5: note: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, signed char)
     operator<<(basic_ostream<char, _Traits>& __out, signed char __c)
     ^
/usr/include/c++/4.8/ostream:488:5: note:   template argument deduction/substitution failed:
prize.cpp:18:22: note:   'std::ifstream {aka std::basic_ifstream<char>}' is not derived from 'std::basic_ostream<char, _Traits>'
     fout<< s - (n - 1) << "\n";

                      ^
In file included from /usr/include/c++/4.8/istream:39:0,
                 from /usr/include/c++/4.8/fstream:38,
                 from prize.cpp:1:
/usr/include/c++/4.8/ostream:493:5: note: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, unsigned char)
     operator<<(basic_ostream<char, _Traits>& __out, unsigned char __c)
     ^
/usr/include/c++/4.8/ostream:493:5: note:   template argument deduction/substitution failed:
prize.cpp:18:22: note:   'std::ifstream {aka std::basic_ifstream<char>}' is not derived from 'std::basic_ostream<char, _Traits>'
     fout<< s - (n - 1) << "\n";

                      ^
In file included from /usr/include/c++/4.8/istream:39:0,
                 from /usr/include/c++/4.8/fstream:38,
                 from prize.cpp:1:
/usr/include/c++/4.8/ostream:513:5: note: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const _CharT*)
     operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s)
     ^
/usr/include/c++/4.8/ostream:513:5: note:   template argument deduction/substitution failed:
prize.cpp:18:22: note:   'std::ifstream {aka std::basic_ifstream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     fout<< s - (n - 1) << "\n";

                      ^
In file included from /usr/include/c++/4.8/ostream:612:0,
                 from /usr/include/c++/4.8/istream:39,
                 from /usr/include/c++/4.8/fstream:38,
                 from prize.cpp:1:
/usr/include/c++/4.8/bits/ostream.tcc:321:5: note: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const char*)
     operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s)
     ^
/usr/include/c++/4.8/bits/ostream.tcc:321:5: note:   template argument deduction/substitution failed:
prize.cpp:18:22: note:   'std::ifstream {aka std::basic_ifstream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     fout<< s - (n - 1) << "\n";

                      ^
In file included from /usr/include/c++/4.8/istream:39:0,
                 from /usr/include/c++/4.8/fstream:38,
                 from prize.cpp:1:
/usr/include/c++/4.8/ostream:530:5: note: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const char*)
     operator<<(basic_ostream<char, _Traits>& __out, const char* __s)
     ^
/usr/include/c++/4.8/ostream:530:5: note:   template argument deduction/substitution failed:
prize.cpp:18:22: note:   'std::ifstream {aka std::basic_ifstream<char>}' is not derived from 'std::basic_ostream<char, _Traits>'
     fout<< s - (n - 1) << "\n";

                      ^
In file included from /usr/include/c++/4.8/istream:39:0,
                 from /usr/include/c++/4.8/fstream:38,
                 from prize.cpp:1:
/usr/include/c++/4.8/ostream:543:5: note: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const signed char*)
     operator<<(basic_ostream<char, _Traits>& __out, const signed char* __s)
     ^
/usr/include/c++/4.8/ostream:543:5: note:   template argument deduction/substitution failed:
prize.cpp:18:22: note:   'std::ifstream {aka std::basic_ifstream<char>}' is not derived from 'std::basic_ostream<char, _Traits>'
     fout<< s - (n - 1) << "\n";

                      ^
In file included from /usr/include/c++/4.8/istream:39:0,
                 from /usr/include/c++/4.8/fstream:38,
                 from prize.cpp:1:
/usr/include/c++/4.8/ostream:548:5: note: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const unsigned char*)
     operator<<(basic_ostream<char, _Traits>& __out, const unsigned char* __s)
     ^
/usr/include/c++/4.8/ostream:548:5: note:   template argument deduction/substitution failed:
prize.cpp:18:22: note:   'std::ifstream {aka std::basic_ifstream<char>}' is not derived from 'std::basic_ostream<char, _Traits>'
     fout<< s - (n - 1) << "\n";

                      ^
In file included from /usr/include/c++/4.8/istream:39:0,
                 from /usr/include/c++/4.8/fstream:38,
                 from prize.cpp:1:
/usr/include/c++/4.8/ostream:602:5: note: template<class _CharT, class _Traits, class _Tp> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&&, const _Tp&)
     operator<<(basic_ostream<_CharT, _Traits>&& __os, const _Tp& __x)
     ^
/usr/include/c++/4.8/ostream:602:5: note:   template argument deduction/substitution failed:
prize.cpp:18:22: note:   'std::ifstream {aka std::basic_ifstream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     fout<< s - (n - 1) << "\n";

                      ^
prize.cpp:11:22: warning: unused variable 'j' [-Wunused-variable]
     int n, s = 0, k, j;

                      ^

Cum funcționează evaluarea?

www.pbinfo.ro permite evaluarea a două tipuri de probleme:

  • probleme la care rezolvarea presupune scrierea unui program complet
  • probleme la care rezolvarea presupune scrierea unei secvențe de program - câteva instrucțiuni, o listă de declarații, una sau mai multe funcții, etc.

Problema Prize face parte din prima categorie. Soluția propusă de tine va fi evaluată astfel:

  • Programul sursă este compilat folosind compilatorul corespunzător. Dacă în urma compilării se obțin erori sau avertismente, acestea sunt afișate în această pagină.
  • Dacă programul a fost compilat, executabilul obținut va fi rulat, furnizându-i-se unul sau mai multe seturi de date de intrare, în concordanță cu restricțiile specifice problemei. Pentru fiecare set de date se obține un anumit punctaj, în raport cu corectitudinea soluției tale.

Suma punctajelor acordate pe testele utilizate pentru verificare este 100. Astfel, soluția ta poate obține cel mult 100 de puncte, caz în care se poate considera corectă.