Compilare: main.cpp: In function 'int main()': main.cpp:41:23: warning: unused variable 'lin1' [-Wunused-variable] 41 | int n,m, i, x, y, lin1, col1, lin2, col2; | ^~~~ main.cpp:41:29: warning: unused variable 'col1' [-Wunused-variable] 41 | int n,m, i, x, y, lin1, col1, lin2, col2; | ^~~~