Rezumat problemă

Combinari1

#4903

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} în care toate elementele au aceeași paritate.

Fișiere Candale Silviu (silviu) ușoară

Clasa 11 Backtracking Elemente de combinatorică

Rezolvă

Detalii

Problema	Combinari1	Operații I/O	combinari1.in/combinari1.out
Limita timp	0.5 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#64437305	Utilizator	malan carina (carina_OMG)
Fișier	combinari1.cpp	Dimensiune	553 B
Data încărcării	06 Mai 2026, 21:52	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

combinari1.cpp:2:1: error: ‘ifstream’ does not name a type
    2 | ifstream cin("combinari1.in");
      | ^~~~~~~~
combinari1.cpp:3:1: error: ‘ofstream’ does not name a type
    3 | ofstream cout("combinari1.out");
      | ^~~~~~~~
combinari1.cpp: In function ‘void afisare()’:
combinari1.cpp:9:9: error: ‘cout’ was not declared in this scope
    9 |         cout<<s[i]<<" ";
      |         ^~~~
combinari1.cpp:2:1: note: ‘std::cout’ is defined in header ‘<iostream>’; did you forget to ‘#include <iostream>’?
    1 | #include <fstream>
  +++ |+#include <iostream>
    2 | ifstream cin("combinari1.in");
combinari1.cpp:10:5: error: ‘cout’ was not declared in this scope
   10 |     cout<<endl;
      |     ^~~~
combinari1.cpp:10:5: note: ‘std::cout’ is defined in header ‘<iostream>’; did you forget to ‘#include <iostream>’?
combinari1.cpp: In function ‘void back(int)’:
combinari1.cpp:21:31: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
   21 |        if(r==1 || s[r-1]%2==0 && s[r]%2==0 || s[r-1]%2!=0 && s[r]%2!=0)
      |                   ~~~~~~~~~~~~^~~~~~~~~~~~
combinari1.cpp:21:59: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
   21 |        if(r==1 || s[r-1]%2==0 && s[r]%2==0 || s[r-1]%2!=0 && s[r]%2!=0)
      |                                               ~~~~~~~~~~~~^~~~~~~~~~~~
combinari1.cpp: In function ‘int main()’:
combinari1.cpp:28:5: error: ‘cin’ was not declared in this scope
   28 |     cin>>n>>k;
      |     ^~~
combinari1.cpp:28:5: note: ‘std::cin’ is defined in header ‘<iostream>’; did you forget to ‘#include <iostream>’?

Cum funcționează evaluarea?