Rezumat problemă

Shuffle

#205

Se citeşte un număr natural nenul n şi o permutare a mulţimii M={1,2,..,n}. Să se afişeze, în ordine lexicografică, toate permutările mulţimii M care nu conţin elemente alăturate care au fost alăturate şi în permutarea dată.

Fișiere Candale Silviu (silviu) medie

Clasa 11 Backtracking Elemente de combinatorică

Rezolvă

Detalii

Problema	Shuffle	Operații I/O	shuffle.in/shuffle.out
Limita timp	0.5 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#64304590	Utilizator	Berdie Rodica (Rodi)
Fișier	shuffle.cpp	Dimensiune	860 B
Data încărcării	28 Aprilie 2026, 19:21	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

shuffle.cpp: In function ‘bool verif(int, int)’:
shuffle.cpp:11:18: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
   11 |       if(k[i]==a && k[i+1]==b || k[i]==b && k[i+1]==a)
      |          ~~~~~~~~^~~~~~~~~~~~
shuffle.cpp: In function ‘void backt(int)’:
shuffle.cpp:21:17: error: reference to ‘cout’ is ambiguous
   21 |                 cout<<s[j]<<" ";
      |                 ^~~~
In file included from shuffle.cpp:1:
/usr/include/c++/13/iostream:63:18: note: candidates are: ‘std::ostream std::cout’
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
shuffle.cpp:5:10: note:                 ‘std::ofstream cout’
    5 | ofstream cout("shuffle.out");
      |          ^~~~
shuffle.cpp:22:14: 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
      |                  ^~~~
shuffle.cpp:5:10: note:                 ‘std::ofstream cout’
    5 | ofstream cout("shuffle.out");
      |          ^~~~
shuffle.cpp:27:37: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
   27 |         if(i==1 || i>1 && viz[j]==0 && verif(s[i-1],j)==true )
      |                    ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
shuffle.cpp: In function ‘int main()’:
shuffle.cpp:38:5: error: reference to ‘cin’ is ambiguous
   38 |     cin>>n;
      |     ^~~
/usr/include/c++/13/iostream:62:18: note: candidates are: ‘std::istream std::cin’
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
shuffle.cpp:4:10: note:                 ‘std::ifstream cin’
    4 | ifstream cin("shuffle.in");
      |          ^~~
shuffle.cpp:41:9: error: reference to ‘cin’ is ambiguous
   41 |         cin>>k[i];
      |         ^~~
/usr/include/c++/13/iostream:62:18: note: candidates are: ‘std::istream std::cin’
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
shuffle.cpp:4:10: note:                 ‘std::ifstream cin’
    4 | ifstream cin("shuffle.in");
      |          ^~~
shuffle.cpp:44:17: error: reference to ‘cout’ is ambiguous
   44 |     if(este==0) cout<<"nu exista";
      |                 ^~~~
/usr/include/c++/13/iostream:63:18: note: candidates are: ‘std::ostream std::cout’
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
shuffle.cpp:5:10: note:                 ‘std::ofstream cout’
    5 | ofstream cout("shuffle.out");
      |          ^~~~

Cum funcționează evaluarea?