Compilare: main.cpp: In function 'void dfs(int, int, int)': main.cpp:37:28: warning: 'nk' may be used uninitialized in this function [-Wmaybe-uninitialized] out << ri + rj + rk << " "; ^~~ main.cpp:35:18: warning: 'nj' may be used uninitialized in this function [-Wmaybe-uninitialized] int rj = (nj - 1) * nj; ~~~~^~~~ main.cpp:15:5: warning: 'ni' may be used uninitialized in this function [-Wmaybe-uninitialized] if(i == M) ^~