Rezumat problemă

plusminus

#1357

Fie n un număr natural.
Să se determine toate posibilitățile de alegere a semnelor + și - pentru care
n = (+|-) 12 + (+|-) 22 + ... + (+|-) n2

Fișiere Minca Carmen (carmen) Carmen Minca ușoară

Clasa 11 Backtracking Probleme diverse

Rezolvă

Detalii

Problema	plusminus	Operații I/O	plusminus.in/plusminus.out
Limita timp	0.2 secunde	Limita memorie	Total: 2 MB / Stivă 2 MB
Id soluție	#56923703	Utilizator	Chivu Razvan (Chivu)
Fișier	plusminus.cpp	Dimensiune	823 B
Data încărcării	11 Martie 2025, 00:34	Scor / rezultat	Eroare de compilare

Evaluare

Mesaj compilare

plusminus.cpp:6:27: error: no matching function for call to 'std::basic_istream<char>::basic_istream(const char [13])'
 istream fin("plusminus.in");

                           ^
plusminus.cpp:6:27: note: candidates are:
In file included from /usr/include/c++/4.8/iostream:40:0,
                 from plusminus.cpp:1:
/usr/include/c++/4.8/istream:606:7: note: std::basic_istream<_CharT, _Traits>::basic_istream() [with _CharT = char; _Traits = std::char_traits<char>]
       basic_istream()
       ^
/usr/include/c++/4.8/istream:606:7: note:   candidate expects 0 arguments, 1 provided
/usr/include/c++/4.8/istream:93:7: note: std::basic_istream<_CharT, _Traits>::basic_istream(std::basic_istream<_CharT, _Traits>::__streambuf_type*) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__streambuf_type = std::basic_streambuf<char>]
       basic_istream(__streambuf_type* __sb)
       ^
/usr/include/c++/4.8/istream:93:7: note:   no known conversion for argument 1 from 'const char [13]' to 'std::basic_istream<char>::__streambuf_type* {aka std::basic_streambuf<char>*}'
plusminus.cpp:7:29: error: no matching function for call to 'std::basic_ostream<char>::basic_ostream(const char [14])'
 ostream fout("plusminus.out");

                             ^
plusminus.cpp:7:29: note: candidates are:
In file included from /usr/include/c++/4.8/iostream:39:0,
                 from plusminus.cpp:1:
/usr/include/c++/4.8/ostream:384:7: note: std::basic_ostream<_CharT, _Traits>::basic_ostream() [with _CharT = char; _Traits = std::char_traits<char>]
       basic_ostream()
       ^
/usr/include/c++/4.8/ostream:384:7: note:   candidate expects 0 arguments, 1 provided
/usr/include/c++/4.8/ostream:84:7: note: std::basic_ostream<_CharT, _Traits>::basic_ostream(std::basic_ostream<_CharT, _Traits>::__streambuf_type*) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__streambuf_type = std::basic_streambuf<char>]
       basic_ostream(__streambuf_type* __sb)
       ^
/usr/include/c++/4.8/ostream:84:7: note:   no known conversion for argument 1 from 'const char [14]' to 'std::basic_ostream<char>::__streambuf_type* {aka std::basic_streambuf<char>*}'
plusminus.cpp: In function 'void schizo(int, std::vector<sign>, int)':
plusminus.cpp:18:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if (signs.size() == n)

                      ^

Cum funcționează evaluarea?