Rezumat problemă

Permutari

#123

Se citeşte un număr natural nenul n. Să se afişeze, în ordine lexicografică, permutările mulţimii {1,2,..,n}.

Fișiere Candale Silviu (silviu) ușoară

Clasa 11 Backtracking Elemente de combinatorică

Rezolvă

Detalii

Problema	Permutari	Operații I/O	permutari.in/permutari.out
Limita timp	0.5 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#64137790	Utilizator	Bora Luca (eu_Bora_Luca)
Fișier	permutari.cpp	Dimensiune	593 B
Data încărcării	20 Aprilie 2026, 08:44	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

permutari.cpp:5:14: error: variable ‘std::ifstream cin’ has initializer but incomplete type
    5 | ifstream cin ("permutari.in");
      |              ^
permutari.cpp:6:14: error: variable ‘std::ofstream cout’ has initializer but incomplete type
    6 | ofstream cout("permutari.out");
      |              ^
permutari.cpp: In function ‘void backt(int)’:
permutari.cpp:21:13: error: reference to ‘cout’ is ambiguous
   21 |             cout<<s[j]<<" ";
      |             ^~~~
In file included from permutari.cpp:2:
/usr/include/c++/13/iostream:63:18: note: candidates are: ‘std::ostream std::cout’
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
permutari.cpp:6:10: note:                 ‘<typeprefixerror>cout’
    6 | ofstream cout("permutari.out");
      |          ^~~~
permutari.cpp:22:9: error: reference to ‘cout’ is ambiguous
   22 |         cout<<'\n';
      |         ^~~~
/usr/include/c++/13/iostream:63:18: note: candidates are: ‘std::ostream std::cout’
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
permutari.cpp:6:10: note:                 ‘<typeprefixerror>cout’
    6 | ofstream cout("permutari.out");
      |          ^~~~
permutari.cpp: In function ‘int main()’:
permutari.cpp:35:5: error: reference to ‘cin’ is ambiguous
   35 |     cin>> n;
      |     ^~~
/usr/include/c++/13/iostream:62:18: note: candidates are: ‘std::istream std::cin’
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
permutari.cpp:5:10: note:                 ‘<typeprefixerror>cin’
    5 | ifstream cin ("permutari.in");
      |          ^~~

Cum funcționează evaluarea?