Rezumat problemă

SumMax

#317

Se dă o matrice pătratică cu n lini şi n coloane şi elemente numere naturale distincte. Determinaţi cea mai mare sumă a n elemente din matrice, cu proprietatea că oricare două elemente se află pe linii şi coloane distincte.

Fișiere Candale Silviu (silviu) medie

Clasa 11 Backtracking Elemente de combinatorică

Rezolvă

Detalii

Problema	SumMax	Operații I/O	summax.in/summax.out
Limita timp	0.75 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#64432429	Utilizator	stef roxana (Stef_Roxana)
Fișier	summax.cpp	Dimensiune	1.45 KB
Data încărcării	06 Mai 2026, 16:52	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

summax.cpp:1:25: warning: extra tokens at end of #include directive
    1 | #include <bits/stdc++.h>#include <bits/stdc++.h>
      |                         ^
summax.cpp: In function ‘int main()’:
summax.cpp:30:5: error: reference to ‘cin’ is ambiguous
   30 |     cin >> n;
      |     ^~~
In file included from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:146,
                 from summax.cpp:1:
/usr/include/c++/13/iostream:62:18: note: candidates are: ‘std::istream std::cin’
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
summax.cpp:4:10: note:                 ‘std::ifstream cin’
    4 | ifstream cin("summax.in");
      |          ^~~
summax.cpp:33:13: error: reference to ‘cin’ is ambiguous
   33 |             cin >> a[i][j];
      |             ^~~
/usr/include/c++/13/iostream:62:18: note: candidates are: ‘std::istream std::cin’
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
summax.cpp:4:10: note:                 ‘std::ifstream cin’
    4 | ifstream cin("summax.in");
      |          ^~~
summax.cpp:35:5: error: reference to ‘cout’ is ambiguous
   35 |     cout << smax;
      |     ^~~~
/usr/include/c++/13/iostream:63:18: note: candidates are: ‘std::ostream std::cout’
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
summax.cpp:5:10: note:                 ‘std::ofstream cout’
    5 | ofstream cout("summax.out");
      |          ^~~~
summax.cpp: At global scope:
summax.cpp:40:10: error: redefinition of ‘std::ifstream cin’
   40 | ifstream cin("summax.in");
      |          ^~~
summax.cpp:4:10: note: ‘std::ifstream cin’ previously declared here
    4 | ifstream cin("summax.in");
      |          ^~~
summax.cpp:41:10: error: redefinition of ‘std::ofstream cout’
   41 | ofstream cout("summax.out");
      |          ^~~~
summax.cpp:5:10: note: ‘std::ofstream cout’ previously declared here
    5 | ofstream cout("summax.out");
      |          ^~~~
summax.cpp:43:5: error: redefinition of ‘int x [11]’
   43 | int x[11] , p[11] , a[11][11] , n , smax , s;
      |     ^
summax.cpp:7:5: note: ‘int x [11]’ previously declared here
    7 | int x[11] , p[11] , a[11][11] , n , smax , s;
      |     ^
summax.cpp:43:13: error: redefinition of ‘int p [11]’
   43 | int x[11] , p[11] , a[11][11] , n , smax , s;
      |             ^
summax.cpp:7:13: note: ‘int p [11]’ previously declared here
    7 | int x[11] , p[11] , a[11][11] , n , smax , s;
      |             ^
summax.cpp:43:21: error: redefinition of ‘int a [11][11]’
   43 | int x[11] , p[11] , a[11][11] , n , smax , s;
      |                     ^
summax.cpp:7:21: note: ‘int a [11][11]’ previously declared here
    7 | int x[11] , p[11] , a[11][11] , n , smax , s;
      |                     ^
summax.cpp:43:33: error: redefinition of ‘int n’
   43 | int x[11] , p[11] , a[11][11] , n , smax , s;
      |                                 ^
summax.cpp:7:33: note: ‘int n’ previously declared here
    7 | int x[11] , p[11] , a[11][11] , n , smax , s;
      |                                 ^
summax.cpp:43:37: error: redefinition of ‘int smax’
   43 | int x[11] , p[11] , a[11][11] , n , smax , s;
      |                                     ^~~~
summax.cpp:7:37: note: ‘int smax’ previously declared here
    7 | int x[11] , p[11] , a[11][11] , n , smax , s;
      |                                     ^~~~
summax.cpp:43:44: error: redefinition of ‘int s’
   43 | int x[11] , p[11] , a[11][11] , n , smax , s;
      |                                            ^
summax.cpp:7:44: note: ‘int s’ previously declared here
    7 | int x[11] , p[11] , a[11][11] , n , smax , s;
      |                                            ^
summax.cpp:46:6: error: redefinition of ‘void back(int)’
   46 | void back(int k)
      |      ^~~~
summax.cpp:10:6: note: ‘void back(int)’ previously defined here
   10 | void back(int k)
      |      ^~~~
summax.cpp:64:5: error: redefinition of ‘int main()’
   64 | int main()
      |     ^~~~
summax.cpp:28:5: note: ‘int main()’ previously defined here
   28 | int main()
      |     ^~~~
summax.cpp: In function ‘int main()’:
summax.cpp:66:5: error: reference to ‘cin’ is ambiguous
   66 |     cin >> n;
      |     ^~~
/usr/include/c++/13/iostream:62:18: note: candidates are: ‘std::istream std::cin’
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
summax.cpp:4:10: note:                 ‘std::ifstream cin’
    4 | ifstream cin("summax.in");
      |          ^~~
summax.cpp:69:13: error: reference to ‘cin’ is ambiguous
   69 |             cin >> a[i][j];
      |             ^~~
/usr/include/c++/13/iostream:62:18: note: candidates are: ‘std::istream std::cin’
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
summax.cpp:4:10: note:                 ‘std::ifstream cin’
    4 | ifstream cin("summax.in");
      |          ^~~
summax.cpp:71:5: error: reference to ‘cout’ is ambiguous
   71 |     cout << smax;
      |     ^~~~
/usr/include/c++/13/iostream:63:18: note: candidates are: ‘std::ostream std::cout’
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
summax.cpp:5:10: note:                 ‘std::ofstream cout’
    5 | ofstream cout("summax.out");
      |          ^~~~

Cum funcționează evaluarea?