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	#55814841	Utilizator	nutu sebi (nutusebi)
Fișier	plusminus.cpp	Dimensiune	637 B
Data încărcării	27 Ianuarie 2025, 16:08	Scor / rezultat	Eroare de compilare

Evaluare

Mesaj compilare

plusminus.cpp:3:13: error: variable 'std::ifstream cin' has initializer but incomplete type
 ifstream cin("plusminus.in");

             ^
plusminus.cpp:4:14: error: variable 'std::ofstream cout' has initializer but incomplete type
 ofstream cout("plusminus.out");

              ^
plusminus.cpp: In function 'void afisare()':
plusminus.cpp:9:24: error: reference to 'cout' is ambiguous
         if(x[i] == -1) cout << "- ";

                        ^
plusminus.cpp:4:10: note: candidates are: <typeprefixerror>cout
 ofstream cout("plusminus.out");

          ^
In file included from plusminus.cpp:1:0:
/usr/include/c++/4.8/iostream:61:18: note:                 std::ostream std::cout
   extern ostream cout;  /// Linked to standard output
                  ^
plusminus.cpp:10:14: error: reference to 'cout' is ambiguous
         else cout << "+ ";

              ^
plusminus.cpp:4:10: note: candidates are: <typeprefixerror>cout
 ofstream cout("plusminus.out");

          ^
In file included from plusminus.cpp:1:0:
/usr/include/c++/4.8/iostream:61:18: note:                 std::ostream std::cout
   extern ostream cout;  /// Linked to standard output
                  ^
plusminus.cpp:11:5: error: reference to 'cout' is ambiguous
     cout << '\n';

     ^
plusminus.cpp:4:10: note: candidates are: <typeprefixerror>cout
 ofstream cout("plusminus.out");

          ^
In file included from plusminus.cpp:1:0:
/usr/include/c++/4.8/iostream:61:18: note:                 std::ostream std::cout
   extern ostream cout;  /// Linked to standard output
                  ^
plusminus.cpp: In function 'int main()':
plusminus.cpp:30:5: error: reference to 'cin' is ambiguous
     cin >> n;

     ^
plusminus.cpp:3:10: note: candidates are: <typeprefixerror>cin
 ifstream cin("plusminus.in");

          ^
In file included from plusminus.cpp:1:0:
/usr/include/c++/4.8/iostream:60:18: note:                 std::istream std::cin
   extern istream cin;  /// Linked to standard input
                  ^
plusminus.cpp:32:13: error: reference to 'cout' is ambiguous
     if(!ok) cout << "IMPOSIBIL";

             ^
plusminus.cpp:4:10: note: candidates are: <typeprefixerror>cout
 ofstream cout("plusminus.out");

          ^
In file included from plusminus.cpp:1:0:
/usr/include/c++/4.8/iostream:61:18: note:                 std::ostream std::cout
   extern ostream cout;  /// Linked to standard output
                  ^

Cum funcționează evaluarea?