Compilare: main.cpp:84:14: warning: multi-character character constant [-Wmultichar] 84 | out << '-1'; | ^~~~ main.cpp: In function 'int main()': main.cpp:83:16: warning: 'cf' may be used uninitialized in this function [-Wmaybe-uninitialized] 83 | if(f[lf][cf] == 0){ | ~~~~~~~~^ main.cpp:83:16: warning: 'lf' may be used uninitialized in this function [-Wmaybe-uninitialized]