Rezumat problemă

Combinari

#197

Se citesc două numere naturale nenule n și k. Să se afişeze, în ordine lexicografică, submulțimile de câte k elemente ale mulţimii {1,2,..,n}.

Fișiere Candale Silviu (silviu) ușoară

Clasa 11 Backtracking Elemente de combinatorică

Rezolvă

Detalii

Problema	Combinari	Operații I/O	combinari.in/combinari.out
Limita timp	0.5 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#64236118	Utilizator	Bordea Haris Samuel (Bordea_Haris_Samuel)
Fișier	combinari.cpp	Dimensiune	799 B
Data încărcării	24 Aprilie 2026, 13:56	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

combinari.cpp: In function ‘void tipar(int)’:
combinari.cpp:10:30: error: reference to ‘cout’ is ambiguous
   10 |     for (int i=1; i<=n; i++) cout<<x[i]<<" ";
      |                              ^~~~
In file included from combinari.cpp:1:
/usr/include/c++/13/iostream:63:18: note: candidates are: ‘std::ostream std::cout’
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
combinari.cpp:5:10: note:                 ‘std::ofstream cout’
    5 | ofstream cout("combinari.out");
      |          ^~~~
combinari.cpp:11:5: error: reference to ‘cout’ is ambiguous
   11 |     cout<<endl;
      |     ^~~~
/usr/include/c++/13/iostream:63:18: note: candidates are: ‘std::ostream std::cout’
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
combinari.cpp:5:10: note:                 ‘std::ofstream cout’
    5 | ofstream cout("combinari.out");
      |          ^~~~
combinari.cpp: In function ‘int valid(int)’:
combinari.cpp:18:9: warning: init-statement in selection statements only available with ‘-std=c++17’ or ‘-std=gnu++17’ [-Wc++17-extensions]
   18 |     if (k>=2 && x[k]<=x[k-1] return 0;
      |         ^
combinari.cpp:18:29: error: expected ‘;’ before ‘return’
   18 |     if (k>=2 && x[k]<=x[k-1] return 0;
      |                             ^~~~~~~
      |                             ;
combinari.cpp:18:14: warning: statement has no effect [-Wunused-value]
   18 |     if (k>=2 && x[k]<=x[k-1] return 0;
      |         ~~~~~^~~~~~~~~~~~~~~
combinari.cpp:19:6: error: expected primary-expression before ‘return’
   19 |      return 1;
      |      ^~~~~~
combinari.cpp:18:39: error: expected ‘)’ before ‘return’
   18 |     if (k>=2 && x[k]<=x[k-1] return 0;
      |        ~                              ^
      |                                       )
   19 |      return 1;
      |      ~~~~~~                            
combinari.cpp: In function ‘void back()’:
combinari.cpp:32:20: error: ‘m’ was not declared in this scope
   32 |             if (k==m) tipar(m);
      |                    ^
combinari.cpp: In function ‘int main()’:
combinari.cpp:42:5: error: reference to ‘cin’ is ambiguous
   42 |     cin>>a>>b>>n;
      |     ^~~
/usr/include/c++/13/iostream:62:18: note: candidates are: ‘std::istream std::cin’
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
combinari.cpp:4:10: note:                 ‘std::ifstream cin’
    4 | ifstream cin("combinari.in");
      |          ^~~
combinari.cpp: In function ‘int valid(int)’:
combinari.cpp:20:1: warning: control reaches end of non-void function [-Wreturn-type]
   20 | }
      | ^

Cum funcționează evaluarea?