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	#64245972	Utilizator	Radu Maria Anastasia (pisi_miaumiau)
Fișier	combinari.cpp	Dimensiune	973 B
Data încărcării	25 Aprilie 2026, 13:06	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

combinari.cpp:7:2: error: expected ‘,’ or ‘;’ before ‘ofstream’
    7 |  ofstream fout("combinari.out")
      |  ^~~~~~~~
combinari.cpp: In function ‘bool ok(int)’:
combinari.cpp:20:6: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation]
   20 |      for(int i=1; i<=k-1; i++)
      |      ^~~
combinari.cpp:23:10: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘for’
   23 |          return 1;
      |          ^~~~~~
combinari.cpp: In function ‘void backtracking(int)’:
combinari.cpp:35:18: error: ‘a’ was not declared in this scope
   35 |       for (int i=a; i<=b; i++)
      |                  ^
combinari.cpp:35:24: error: ‘b’ was not declared in this scope
   35 |       for (int i=a; i<=b; i++)
      |                        ^
combinari.cpp:40:19: error: ‘afis’ was not declared in this scope
   40 |                   afis(k);
      |                   ^~~~
combinari.cpp:38:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wdangling-else]
   38 |             if(ok(k)==1)
      |               ^
combinari.cpp: In function ‘int main()’:
combinari.cpp:52:6: error: ‘fout’ was not declared in this scope
   52 |      fout.close();
      |      ^~~~

Cum funcționează evaluarea?