Compilare: main.cpp: In function 'int main()': main.cpp:32:15: warning: left operand of comma operator has no effect [-Wunused-value] 32 | r += (2, i + 'a'); | ^ main.cpp: In function 'int rez(int, char)': main.cpp:10:38: warning: array subscript 49 is above array bounds of 'int [30]' [-Warray-bounds] 10 | if(v[cif - '0'][j + 'a' - '0'] == 0){ | ~~~~~~~~~~~~~~~~~~~~~~~~~~^ main.cpp:3:8: note: while referencing 'v' 3 | int n, v[30][30]; | ^