Compilare: main.cpp: In function 'int main()': main.cpp:78:25: warning: statement has no effect [-Wunused-value] R[i][j] -1; ~~~~~~~~^~ main.cpp:109:37: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized] g << min + 1 <<" "<< l <<" "<< c; ^ main.cpp:109:30: warning: 'l' may be used uninitialized in this function [-Wmaybe-uninitialized] g << min + 1 <<" "<< l <<" "<< c; ^~~