Rezumat problemă

lumina

#4051

Se consideră un panou de dimensiuni \(n \times m\) pe care sunt așezate \(nm\) becuri. Becul de pe rândul \(i\) și coloana \(j\) se notează \((i,j)\). Inițial, fiecare bec este stins (\(0\)) sau aprins (\(1\)). Putem efectua următoarele comenzi de oricâte ori:

• Se alege un rând \(i\) (\(1 \le i \le n\)) și se inversează starea tuturor becurilor de pe rândul \(i\) (\(0\rightarrow 1,1\rightarrow 0\));
• Se alege o coloană \(j\) (\(1 \le j \le m\)) și se inversează starea tuturor becurilor de pe coloana \(j\) (\(0\rightarrow 1,1\rightarrow 0\)).

Găsiți o secvență cu un număr minim de comenzi care conduce la aprinderea tuturor becurilor.

Simulare concurs CEX Hunedoara, februarie 2022

Consola Todoran Alexandru (alextodoran) Alexandru Raul Todoran concurs

Clasa 9 Tablouri bidimensionale (matrice) Parcurgerea matricelor oarecare

Rezolvă

Detalii

Problema	lumina	Operații I/O	tastatură/ecran
Limita timp	0.1 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#62958531	Utilizator	Diosan Stefan (Miuwastaken)
Fișier	lumina.cpp	Dimensiune	1.53 KB
Data încărcării	08 Februarie 2026, 18:53	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

lumina.cpp:5:34: error: declaration of 'a' as array of references
 void changeline(int i, bool &a[][]) {

                                  ^
lumina.cpp: In function 'void changeline(...)':
lumina.cpp:7:9: error: 'a' was not declared in this scope
         a[i][j] = !a[i][j];

         ^
lumina.cpp:7:11: error: 'i' was not declared in this scope
         a[i][j] = !a[i][j];

           ^
lumina.cpp: At global scope:
lumina.cpp:10:35: error: declaration of 'a' as array of references
 void changecolon(int j, bool &a[][]) {

                                   ^
lumina.cpp: In function 'void changecolon(...)':
lumina.cpp:12:9: error: 'a' was not declared in this scope
         a[i][j] = !a[i][j];

         ^
lumina.cpp:12:14: error: 'j' was not declared in this scope
         a[i][j] = !a[i][j];

              ^
lumina.cpp: At global scope:
lumina.cpp:16:25: error: declaration of 'a' as multidimensional array must have bounds for all dimensions except the first
 bool isgudvret(bool a[][]) {

                         ^
lumina.cpp: In function 'bool isgudvret(...)':
lumina.cpp:19:17: error: 'a' was not declared in this scope
             if (a[i][j] == a[i + 1][j]) return false;

                 ^
lumina.cpp:24:13: error: 'a' was not declared in this scope
         if (a[0][j] == a[1][j]) return false;

             ^
lumina.cpp:22:9: warning: unused variable 'i' [-Wunused-variable]
     int i = n;

         ^
lumina.cpp: At global scope:
lumina.cpp:28:25: error: declaration of 'a' as multidimensional array must have bounds for all dimensions except the first
 bool isgudhori(bool a[][]) {

                         ^
lumina.cpp: In function 'bool isgudhori(...)':
lumina.cpp:31:17: error: 'a' was not declared in this scope
             if (a[i][j] == a[i][j + 1]) return false;

                 ^
lumina.cpp:36:13: error: 'a' was not declared in this scope
         if (a[i][0] == a[i][1]) return false;

             ^
lumina.cpp:34:9: warning: unused variable 'j' [-Wunused-variable]
     int j = m;

         ^
lumina.cpp: In function 'int main()':
lumina.cpp:51:22: error: expected primary-expression before ']' token
     if ((isgudhori(a[][]) == false) && isgudvret(a[][])) {

                      ^
lumina.cpp:51:24: error: expected primary-expression before ']' token
     if ((isgudhori(a[][]) == false) && isgudvret(a[][])) {

                        ^
lumina.cpp:51:52: error: expected primary-expression before ']' token
     if ((isgudhori(a[][]) == false) && isgudvret(a[][])) {

                                                    ^
lumina.cpp:51:54: error: expected primary-expression before ']' token
     if ((isgudhori(a[][]) == false) && isgudvret(a[][])) {

                                                      ^
lumina.cpp:60:32: error: 'i' was not declared in this scope
         for (int j = 0; j < m; i++) {

                                ^
lumina.cpp:42:9: warning: unused variable 's' [-Wunused-variable]
     int s = 0;

         ^
lumina.cpp:43:9: warning: unused variable 'vec' [-Wunused-variable]
     int vec[100];

         ^

Cum funcționează evaluarea?