Compilare: main.cpp: In function 'void dfs(int, int, int)': main.cpp:38:28: warning: 'nk' may be used uninitialized in this function [-Wmaybe-uninitialized] out << ri + rj + rk << " "; ^~~ main.cpp:36:18: warning: 'nj' may be used uninitialized in this function [-Wmaybe-uninitialized] int rj = (nj - 1) * ni; ~~~~^~~~ main.cpp:36:25: warning: 'ni' may be used uninitialized in this function [-Wmaybe-uninitialized] int rj = (nj - 1) * ni; ^~