Compilare: main.cpp: In function 'int main()': main.cpp:83:62: warning: 'sol.coordonates::col' may be used uninitialized in this function [-Wmaybe-uninitialized] g << best << " " << sol.row + 1 << " " << sol.col + 1 << '\n'; ^~~~ main.cpp:83:40: warning: 'sol.coordonates::row' may be used uninitialized in this function [-Wmaybe-uninitialized] g << best << " " << sol.row + 1 << " " << sol.col + 1 << '\n'; ^~~