Rezumat problemă

Permutari2

#125

Se citeşte un număr natural nenul n, apoi n numere naturale distincte. Să se afişeze, în ordine lexicografică, permutările mulţimii formate din cele n numere citite.

Fișiere Candale Silviu (silviu) medie

Clasa 11 Backtracking Elemente de combinatorică

Rezolvă

Detalii

Problema	Permutari2	Operații I/O	permutari2.in/permutari2.out
Limita timp	0.5 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#52452968	Utilizator	Raluca Vlad (RaLuCa1223)
Fișier	permutari2.cpp	Dimensiune	1.23 KB
Data încărcării	30 Septembrie 2024, 17:54	Scor / rezultat	Eroare de compilare

Evaluare

Mesaj compilare

permutari2.cpp:8:1: error: stray '\302' in program
     cin>>n;

 ^
permutari2.cpp:8:1: error: stray '\240' in program
permutari2.cpp:8:1: error: stray '\302' in program
permutari2.cpp:8:1: error: stray '\240' in program
permutari2.cpp:9:1: error: stray '\302' in program
     for ( int i = 1 ; i <= n ; i ++ )

 ^
permutari2.cpp:9:1: error: stray '\240' in program
permutari2.cpp:9:1: error: stray '\302' in program
permutari2.cpp:9:1: error: stray '\240' in program
permutari2.cpp:10:1: error: stray '\302' in program
         cin >> v[i];

 ^
permutari2.cpp:10:1: error: stray '\240' in program
permutari2.cpp:10:1: error: stray '\302' in program
permutari2.cpp:10:1: error: stray '\240' in program
permutari2.cpp:10:1: error: stray '\302' in program
permutari2.cpp:10:1: error: stray '\240' in program
permutari2.cpp:10:1: error: stray '\302' in program
permutari2.cpp:10:1: error: stray '\240' in program
permutari2.cpp:11:1: error: stray '\302' in program
     for(int i=1; i<=n-1; i++)

 ^
permutari2.cpp:11:1: error: stray '\240' in program
permutari2.cpp:11:1: error: stray '\302' in program
permutari2.cpp:11:1: error: stray '\240' in program
permutari2.cpp:12:1: error: stray '\302' in program
     {

 ^
permutari2.cpp:12:1: error: stray '\240' in program
permutari2.cpp:12:1: error: stray '\302' in program
permutari2.cpp:12:1: error: stray '\240' in program
permutari2.cpp:13:1: error: stray '\302' in program
         for(int j=i+1; j<=n; j++)

 ^
permutari2.cpp:13:1: error: stray '\240' in program
permutari2.cpp:13:1: error: stray '\302' in program
permutari2.cpp:13:1: error: stray '\240' in program
permutari2.cpp:13:1: error: stray '\302' in program
permutari2.cpp:13:1: error: stray '\240' in program
permutari2.cpp:13:1: error: stray '\302' in program
permutari2.cpp:13:1: error: stray '\240' in program
permutari2.cpp:14:1: error: stray '\302' in program
         {

 ^
permutari2.cpp:14:1: error: stray '\240' in program
permutari2.cpp:14:1: error: stray '\302' in program
permutari2.cpp:14:1: error: stray '\240' in program
permutari2.cpp:14:1: error: stray '\302' in program
permutari2.cpp:14:1: error: stray '\240' in program
permutari2.cpp:14:1: error: stray '\302' in program
permutari2.cpp:14:1: error: stray '\240' in program
permutari2.cpp:15:1: error: stray '\302' in program
             if(v[i]>v[j])

 ^
permutari2.cpp:15:1: error: stray '\240' in program
permutari2.cpp:15:1: error: stray '\302' in program
permutari2.cpp:15:1: error: stray '\240' in program
permutari2.cpp:15:1: error: stray '\302' in program
permutari2.cpp:15:1: error: stray '\240' in program
permutari2.cpp:15:1: error: stray '\302' in program
permutari2.cpp:15:1: error: stray '\240' in program
permutari2.cpp:15:1: error: stray '\302' in program
permutari2.cpp:15:1: error: stray '\240' in program
permutari2.cpp:15:1: error: stray '\302' in program
permutari2.cpp:15:1: error: stray '\240' in program
permutari2.cpp:16:1: error: stray '\302' in program
             {

 ^
permutari2.cpp:16:1: error: stray '\240' in program
permutari2.cpp:16:1: error: stray '\302' in program
permutari2.cpp:16:1: error: stray '\240' in program
permutari2.cpp:16:1: error: stray '\302' in program
permutari2.cpp:16:1: error: stray '\240' in program
permutari2.cpp:16:1: error: stray '\302' in program
permutari2.cpp:16:1: error: stray '\240' in program
permutari2.cpp:16:1: error: stray '\302' in program
permutari2.cpp:16:1: error: stray '\240' in program
permutari2.cpp:16:1: error: stray '\302' in program
permutari2.cpp:16:1: error: stray '\240' in program
permutari2.cpp:17:1: error: stray '\302' in program
                 int aux=v[i];

 ^
permutari2.cpp:17:1: error: stray '\240' in program
permutari2.cpp:17:1: error: stray '\302' in program
permutari2.cpp:17:1: error: stray '\240' in program
permutari2.cpp:17:1: error: stray '\302' in program
permutari2.cpp:17:1: error: stray '\240' in program
permutari2.cpp:17:1: error: stray '\302' in program
permutari2.cpp:17:1: error: stray '\240' in program
permutari2.cpp:17:1: error: stray '\302' in program
permutari2.cpp:17:1: error: stray '\240' in program
permutari2.cpp:17:1: error: stray '\302' in program
permutari2.cpp:17:1: error: stray '\240' in program
permutari2.cpp:17:1: error: stray '\302' in program
permutari2.cpp:17:1: error: stray '\240' in program
permutari2.cpp:17:1: error: stray '\302' in program
permutari2.cpp:17:1: error: stray '\240' in program
permutari2.cpp:18:1: error: stray '\302' in program
                 v[i]=v[j];

 ^
permutari2.cpp:18:1: error: stray '\240' in program
permutari2.cpp:18:1: error: stray '\302' in program
permutari2.cpp:18:1: error: stray '\240' in program
permutari2.cpp:18:1: error: stray '\302' in program
permutari2.cpp:18:1: error: stray '\240' in program
permutari2.cpp:18:1: error: stray '\302' in program
permutari2.cpp:18:1: error: stray '\240' in program
permutari2.cpp:18:1: error: stray '\302' in program
permutari2.cpp:18:1: error: stray '\240' in program
permutari2.cpp:18:1: error: stray '\302' in program
permutari2.cpp:18:1: error: stray '\240' in program
permutari2.cpp:18:1: error: stray '\302' in program
permutari2.cpp:18:1: error: stray '\240' in program
permutari2.cpp:18:1: error: stray '\302' in program
permutari2.cpp:18:1: error: stray '\240' in program
permutari2.cpp:19:1: error: stray '\302' in program
                 v[j]=aux;

 ^
permutari2.cpp:19:1: error: stray '\240' in program
permutari2.cpp:19:1: error: stray '\302' in program
permutari2.cpp:19:1: error: stray '\240' in program
permutari2.cpp:19:1: error: stray '\302' in program
permutari2.cpp:19:1: error: stray '\240' in program
permutari2.cpp:19:1: error: stray '\302' in program
permutari2.cpp:19:1: error: stray '\240' in program
permutari2.cpp:19:1: error: stray '\302' in program
permutari2.cpp:19:1: error: stray '\240' in program
permutari2.cpp:19:1: error: stray '\302' in program
permutari2.cpp:19:1: error: stray '\240' in program
permutari2.cpp:19:1: error: stray '\302' in program
permutari2.cpp:19:1: error: stray '\240' in program
permutari2.cpp:19:1: error: stray '\302' in program
permutari2.cpp:19:1: error: stray '\240' in program
permutari2.cpp:20:1: error: stray '\302' in program
             }

 ^
permutari2.cpp:20:1: error: stray '\240' in program
permutari2.cpp:20:1: error: stray '\302' in program
permutari2.cpp:20:1: error: stray '\240' in program
permutari2.cpp:20:1: error: stray '\302' in program
permutari2.cpp:20:1: error: stray '\240' in program
permutari2.cpp:20:1: error: stray '\302' in program
permutari2.cpp:20:1: error: stray '\240' in program
permutari2.cpp:20:1: error: stray '\302' in program
permutari2.cpp:20:1: error: stray '\240' in program
permutari2.cpp:20:1: error: stray '\302' in program
permutari2.cpp:20:1: error: stray '\240' in program
permutari2.cpp:21:1: error: stray '\302' in program
         }

 ^
permutari2.cpp:21:1: error: stray '\240' in program
permutari2.cpp:21:1: error: stray '\302' in program
permutari2.cpp:21:1: error: stray '\240' in program
permutari2.cpp:21:1: error: stray '\302' in program
permutari2.cpp:21:1: error: stray '\240' in program
permutari2.cpp:21:1: error: stray '\302' in program
permutari2.cpp:21:1: error: stray '\240' in program
permutari2.cpp:22:1: error: stray '\302' in program
     }

 ^
permutari2.cpp:22:1: error: stray '\240' in program
permutari2.cpp:22:1: error: stray '\302' in program
permutari2.cpp:22:1: error: stray '\240' in program
permutari2.cpp:24:1: error: stray '\302' in program
     int valid(int niv)

 ^
permutari2.cpp:24:1: error: stray '\240' in program
permutari2.cpp:24:1: error: stray '\302' in program
permutari2.cpp:24:1: error: stray '\240' in program
permutari2.cpp:25:1: error: stray '\302' in program
     {

 ^
permutari2.cpp:25:1: error: stray '\240' in program
permutari2.cpp:25:1: error: stray '\302' in program
permutari2.cpp:25:1: error: stray '\240' in program
permutari2.cpp:26:1: error: stray '\302' in program
         for(int i=1; i<=niv-1; i++)

 ^
permutari2.cpp:26:1: error: stray '\240' in program
permutari2.cpp:26:1: error: stray '\302' in program
permutari2.cpp:26:1: error: stray '\240' in program
permutari2.cpp:26:1: error: stray '\302' in program
permutari2.cpp:26:1: error: stray '\240' in program
permutari2.cpp:26:1: error: stray '\302' in program
permutari2.cpp:26:1: error: stray '\240' in program
permutari2.cpp:27:1: error: stray '\302' in program
             if(st[niv] == st[i])

 ^
permutari2.cpp:27:1: error: stray '\240' in program
permutari2.cpp:27:1: error: stray '\302' in program
permutari2.cpp:27:1: error: stray '\240' in program
permutari2.cpp:27:1: error: stray '\302' in program
permutari2.cpp:27:1: error: stray '\240' in program
permutari2.cpp:27:1: error: stray '\302' in program
permutari2.cpp:27:1: error: stray '\240' in program
permutari2.cpp:27:1: error: stray '\302' in program
permutari2.cpp:27:1: error: stray '\240' in program
permutari2.cpp:27:1: error: stray '\302' in program
permutari2.cpp:27:1: error: stray '\240' in program
permutari2.cpp:28:1: error: stray '\302' in program
                 return 0;

 ^
permutari2.cpp:28:1: error: stray '\240' in program
permutari2.cpp:28:1: error: stray '\302' in program
permutari2.cpp:28:1: error: stray '\240' in program
permutari2.cpp:28:1: error: stray '\302' in program
permutari2.cpp:28:1: error: stray '\240' in program
permutari2.cpp:28:1: error: stray '\302' in program
permutari2.cpp:28:1: error: stray '\240' in program
permutari2.cpp:28:1: error: stray '\302' in program
permutari2.cpp:28:1: error: stray '\240' in program
permutari2.cpp:28:1: error: stray '\302' in program
permutari2.cpp:28:1: error: stray '\240' in program
permutari2.cpp:28:1: error: stray '\302' in program
permutari2.cpp:28:1: error: stray '\240' in program
permutari2.cpp:28:1: error: stray '\302' in program
permutari2.cpp:28:1: error: stray '\240' in program
permutari2.cpp:30:1: error: stray '\302' in program
         return 1;

 ^
permutari2.cpp:30:1: error: stray '\240' in program
permutari2.cpp:30:1: error: stray '\302' in program
permutari2.cpp:30:1: error: stray '\240' in program
permutari2.cpp:30:1: error: stray '\302' in program
permutari2.cpp:30:1: error: stray '\240' in program
permutari2.cpp:30:1: error: stray '\302' in program
permutari2.cpp:30:1: error: stray '\240' in program
permutari2.cpp:31:1: error: stray '\302' in program
     }

 ^
permutari2.cpp:31:1: error: stray '\240' in program
permutari2.cpp:31:1: error: stray '\302' in program
permutari2.cpp:31:1: error: stray '\240' in program
permutari2.cpp:33:1: error: stray '\302' in program
     void afis(int niv)

 ^
permutari2.cpp:33:1: error: stray '\240' in program
permutari2.cpp:33:1: error: stray '\302' in program
permutari2.cpp:33:1: error: stray '\240' in program
permutari2.cpp:34:1: error: stray '\302' in program
     {

 ^
permutari2.cpp:34:1: error: stray '\240' in program
permutari2.cpp:34:1: error: stray '\302' in program
permutari2.cpp:34:1: error: stray '\240' in program
permutari2.cpp:35:1: error: stray '\302' in program
         for(int i=1; i<=niv; i++)

 ^
permutari2.cpp:35:1: error: stray '\240' in program
permutari2.cpp:35:1: error: stray '\302' in program
permutari2.cpp:35:1: error: stray '\240' in program
permutari2.cpp:35:1: error: stray '\302' in program
permutari2.cpp:35:1: error: stray '\240' in program
permutari2.cpp:35:1: error: stray '\302' in program
permutari2.cpp:35:1: error: stray '\240' in program
permutari2.cpp:36:1: error: stray '\302' in program
             cout<<st[i]<<' ';

 ^
permutari2.cpp:36:1: error: stray '\240' in program
permutari2.cpp:36:1: error: stray '\302' in program
permutari2.cpp:36:1: error: stray '\240' in program
permutari2.cpp:36:1: error: stray '\302' in program
permutari2.cpp:36:1: error: stray '\240' in program
permutari2.cpp:36:1: error: stray '\302' in program
permutari2.cpp:36:1: error: stray '\240' in program
permutari2.cpp:36:1: error: stray '\302' in program
permutari2.cpp:36:1: error: stray '\240' in program
permutari2.cpp:36:1: error: stray '\302' in program
permutari2.cpp:36:1: error: stray '\240' in program
permutari2.cpp:37:1: error: stray '\302' in program
         cout<<endl;

 ^
permutari2.cpp:37:1: error: stray '\240' in program
permutari2.cpp:37:1: error: stray '\302' in program
permutari2.cpp:37:1: error: stray '\240' in program
permutari2.cpp:37:1: error: stray '\302' in program
permutari2.cpp:37:1: error: stray '\240' in program
permutari2.cpp:37:1: error: stray '\302' in program
permutari2.cpp:37:1: error: stray '\240' in program
permutari2.cpp:38:1: error: stray '\302' in program
     }

 ^
permutari2.cpp:38:1: error: stray '\240' in program
permutari2.cpp:38:1: error: stray '\302' in program
permutari2.cpp:38:1: error: stray '\240' in program
permutari2.cpp:40:1: error: stray '\302' in program
     void bktr(int niv)

 ^
permutari2.cpp:40:1: error: stray '\240' in program
permutari2.cpp:40:1: error: stray '\302' in program
permutari2.cpp:40:1: error: stray '\240' in program
permutari2.cpp:41:1: error: stray '\302' in program
     {

 ^
permutari2.cpp:41:1: error: stray '\240' in program
permutari2.cpp:41:1: error: stray '\302' in program
permutari2.cpp:41:1: error: stray '\240' in program
permutari2.cpp:42:1: error: stray '\302' in program
         for(int i=1; i<=n; i++)

 ^
permutari2.cpp:42:1: error: stray '\240' in program
permutari2.cpp:42:1: error: stray '\302' in program
permutari2.cpp:42:1: error: stray '\240' in program
permutari2.cpp:42:1: error: stray '\302' in program
permutari2.cpp:42:1: error: stray '\240' in program
permutari2.cpp:42:1: error: stray '\302' in program
permutari2.cpp:42:1: error: stray '\240' in program
permutari2.cpp:44:1: error: stray '\302' in program
         {

 ^
permutari2.cpp:44:1: error: stray '\240' in program
permutari2.cpp:44:1: error: stray '\302' in program
permutari2.cpp:44:1: error: stray '\240' in program
permutari2.cpp:44:1: error: stray '\302' in program
permutari2.cpp:44:1: error: stray '\240' in program
permutari2.cpp:44:1: error: stray '\302' in program
permutari2.cpp:44:1: error: stray '\240' in program
permutari2.cpp:45:1: error: stray '\302' in program
             st[niv]=v[i];

 ^
permutari2.cpp:45:1: error: stray '\240' in program
permutari2.cpp:45:1: error: stray '\302' in program
permutari2.cpp:45:1: error: stray '\240' in program
permutari2.cpp:45:1: error: stray '\302' in program
permutari2.cpp:45:1: error: stray '\240' in program
permutari2.cpp:45:1: error: stray '\302' in program
permutari2.cpp:45:1: error: stray '\240' in program
permutari2.cpp:45:1: error: stray '\302' in program
permutari2.cpp:45:1: error: stray '\240' in program
permutari2.cpp:45:1: error: stray '\302' in program
permutari2.cpp:45:1: error: stray '\240' in program
permutari2.cpp:46:1: error: stray '\302' in program
             if( valid(niv)==1 )

 ^
permutari2.cpp:46:1: error: stray '\240' in program
permutari2.cpp:46:1: error: stray '\302' in program
permutari2.cpp:46:1: error: stray '\240' in program
permutari2.cpp:46:1: error: stray '\302' in program
permutari2.cpp:46:1: error: stray '\240' in program
permutari2.cpp:46:1: error: stray '\302' in program
permutari2.cpp:46:1: error: stray '\240' in program
permutari2.cpp:46:1: error: stray '\302' in program
permutari2.cpp:46:1: error: stray '\240' in program
permutari2.cpp:46:1: error: stray '\302' in program
permutari2.cpp:46:1: error: stray '\240' in program
permutari2.cpp:47:1: error: stray '\302' in program
                 if( niv==n )

 ^
permutari2.cpp:47:1: error: stray '\240' in program
permutari2.cpp:47:1: error: stray '\302' in program
permutari2.cpp:47:1: error: stray '\240' in program
permutari2.cpp:47:1: error: stray '\302' in program
permutari2.cpp:47:1: error: stray '\240' in program
permutari2.cpp:47:1: error: stray '\302' in program
permutari2.cpp:47:1: error: stray '\240' in program
permutari2.cpp:47:1: error: stray '\302' in program
permutari2.cpp:47:1: error: stray '\240' in program
permutari2.cpp:47:1: error: stray '\302' in program
permutari2.cpp:47:1: error: stray '\240' in program
permutari2.cpp:47:1: error: stray '\302' in program
permutari2.cpp:47:1: error: stray '\240' in program
permutari2.cpp:47:1: error: stray '\302' in program
permutari2.cpp:47:1: error: stray '\240' in program
permutari2.cpp:48:1: error: stray '\302' in program
                     afis(niv);

 ^
permutari2.cpp:48:1: error: stray '\240' in program
permutari2.cpp:48:1: error: stray '\302' in program
permutari2.cpp:48:1: error: stray '\240' in program
permutari2.cpp:48:1: error: stray '\302' in program
permutari2.cpp:48:1: error: stray '\240' in program
permutari2.cpp:48:1: error: stray '\302' in program
permutari2.cpp:48:1: error: stray '\240' in program
permutari2.cpp:48:1: error: stray '\302' in program
permutari2.cpp:48:1: error: stray '\240' in program
permutari2.cpp:48:1: error: stray '\302' in program
permutari2.cpp:48:1: error: stray '\240' in program
permutari2.cpp:48:1: error: stray '\302' in program
permutari2.cpp:48:1: error: stray '\240' in program
permutari2.cpp:48:1: error: stray '\302' in program
permutari2.cpp:48:1: error: stray '\240' in program
permutari2.cpp:48:1: error: stray '\302' in program
permutari2.cpp:48:1: error: stray '\240' in program
permutari2.cpp:48:1: error: stray '\302' in program
permutari2.cpp:48:1: error: stray '\240' in program
permutari2.cpp:49:1: error: stray '\302' in program
                 else bktr(niv+1);

 ^
permutari2.cpp:49:1: error: stray '\240' in program
permutari2.cpp:49:1: error: stray '\302' in program
permutari2.cpp:49:1: error: stray '\240' in program
permutari2.cpp:49:1: error: stray '\302' in program
permutari2.cpp:49:1: error: stray '\240' in program
permutari2.cpp:49:1: error: stray '\302' in program
permutari2.cpp:49:1: error: stray '\240' in program
permutari2.cpp:49:1: error: stray '\302' in program
permutari2.cpp:49:1: error: stray '\240' in program
permutari2.cpp:49:1: error: stray '\302' in program
permutari2.cpp:49:1: error: stray '\240' in program
permutari2.cpp:49:1: error: stray '\302' in program
permutari2.cpp:49:1: error: stray '\240' in program
permutari2.cpp:49:1: error: stray '\302' in program
permutari2.cpp:49:1: error: stray '\240' in program
permutari2.cpp:50:1: error: stray '\302' in program
         }

 ^
permutari2.cpp:50:1: error: stray '\240' in program
permutari2.cpp:50:1: error: stray '\302' in program
permutari2.cpp:50:1: error: stray '\240' in program
permutari2.cpp:50:1: error: stray '\302' in program
permutari2.cpp:50:1: error: stray '\240' in program
permutari2.cpp:50:1: error: stray '\302' in program
permutari2.cpp:50:1: error: stray '\240' in program
permutari2.cpp:51:1: error: stray '\302' in program
     }

 ^
permutari2.cpp:51:1: error: stray '\240' in program
permutari2.cpp:51:1: error: stray '\302' in program
permutari2.cpp:51:1: error: stray '\240' in program
permutari2.cpp:52:1: error: stray '\302' in program
     int main()

 ^
permutari2.cpp:52:1: error: stray '\240' in program
permutari2.cpp:52:1: error: stray '\302' in program
permutari2.cpp:52:1: error: stray '\240' in program
permutari2.cpp:53:1: error: stray '\302' in program
     {

 ^
permutari2.cpp:53:1: error: stray '\240' in program
permutari2.cpp:53:1: error: stray '\302' in program
permutari2.cpp:53:1: error: stray '\240' in program
permutari2.cpp:54:1: error: stray '\302' in program
         citire();

 ^
permutari2.cpp:54:1: error: stray '\240' in program
permutari2.cpp:54:1: error: stray '\302' in program
permutari2.cpp:54:1: error: stray '\240' in program
permutari2.cpp:54:1: error: stray '\302' in program
permutari2.cpp:54:1: error: stray '\240' in program
permutari2.cpp:54:1: error: stray '\302' in program
permutari2.cpp:54:1: error: stray '\240' in program
permutari2.cpp:55:1: error: stray '\302' in program
         cout<<"solutii :"<<endl;

 ^
permutari2.cpp:55:1: error: stray '\240' in program
permutari2.cpp:55:1: error: stray '\302' in program
permutari2.cpp:55:1: error: stray '\240' in program
permutari2.cpp:55:1: error: stray '\302' in program
permutari2.cpp:55:1: error: stray '\240' in program
permutari2.cpp:55:1: error: stray '\302' in program
permutari2.cpp:55:1: error: stray '\240' in program
permutari2.cpp:56:1: error: stray '\302' in program
         bktr(1);

 ^
permutari2.cpp:56:1: error: stray '\240' in program
permutari2.cpp:56:1: error: stray '\302' in program
permutari2.cpp:56:1: error: stray '\240' in program
permutari2.cpp:56:1: error: stray '\302' in program
permutari2.cpp:56:1: error: stray '\240' in program
permutari2.cpp:56:1: error: stray '\302' in program
permutari2.cpp:56:1: error: stray '\240' in program
permutari2.cpp:57:1: error: stray '\302' in program
         return 0;

 ^
permutari2.cpp:57:1: error: stray '\240' in program
permutari2.cpp:57:1: error: stray '\302' in program
permutari2.cpp:57:1: error: stray '\240' in program
permutari2.cpp:57:1: error: stray '\302' in program
permutari2.cpp:57:1: error: stray '\240' in program
permutari2.cpp:57:1: error: stray '\302' in program
permutari2.cpp:57:1: error: stray '\240' in program
permutari2.cpp:58:1: error: stray '\302' in program
     }
 ^
permutari2.cpp:58:1: error: stray '\240' in program
permutari2.cpp:58:1: error: stray '\302' in program
permutari2.cpp:58:1: error: stray '\240' in program
permutari2.cpp: In function 'void bktr(int)':
permutari2.cpp:46:21: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
             if( valid(niv)==1 )

                     ^

Cum funcționează evaluarea?