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	#64339798	Utilizator	pop loredana (loredanapop)
Fișier	combinari.cpp	Dimensiune	752 B
Data încărcării	30 Aprilie 2026, 13:22	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

combinari.cpp:3:11: error: variable ‘std::ifstream f’ has initializer but incomplete type
    3 | ifstream f("combinari.in")
      |           ^
combinari.cpp:4:5: error: expected ‘,’ or ‘;’ before ‘ofstream’
    4 |     ofstream g("combinari.out")
      |     ^~~~~~~~
combinari.cpp: In function ‘void Afis(int)’:
combinari.cpp:11:9: error: ‘g’ was not declared in this scope
   11 |         g<< x[j] << " ";
      |         ^
combinari.cpp:11:13: error: ‘x’ was not declared in this scope
   11 |         g<< x[j] << " ";
      |             ^
combinari.cpp:12:5: error: ‘g’ was not declared in this scope
   12 |     g << endl;
      |     ^
combinari.cpp: In function ‘bool OK(int)’:
combinari.cpp:17:12: error: ‘x’ was not declared in this scope
   17 |         if(x[k] == x[i])
      |            ^
combinari.cpp:20:12: error: ‘x’ was not declared in this scope
   20 |         if(x[k] <= x[k-1])
      |            ^
combinari.cpp: In function ‘bool Solutie(int)’:
combinari.cpp:27:17: error: ‘p’ was not declared in this scope
   27 |     return k == p;
      |                 ^
combinari.cpp: In function ‘void back(int)’:
combinari.cpp:31:26: error: ‘n’ was not declared in this scope
   31 |     for(int i = 1 ; i <= n ; ++ i)
      |                          ^
combinari.cpp:33:9: error: ‘x’ was not declared in this scope
   33 |         x[k] = i;
      |         ^
combinari.cpp:34:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wdangling-else]
   34 |         if(OK(k))
      |           ^
combinari.cpp: In function ‘int main()’:
combinari.cpp:42:10: error: ‘n’ was not declared in this scope
   42 |     f >> n >> p;
      |          ^
combinari.cpp:42:15: error: ‘p’ was not declared in this scope
   42 |     f >> n >> p;
      |               ^

Cum funcționează evaluarea?