Compilare: main.cpp: In function 'int main()': main.cpp:47:25: warning: unused variable 'dif1' [-Wunused-variable] 47 | int dif1=n-i+1; | ^~~~ main.cpp:58:25: warning: unused variable 'dif1' [-Wunused-variable] 58 | int dif1=m-j+1; | ^~~~ main.cpp:73:29: warning: unused variable 'dif1' [-Wunused-variable] 73 | int dif1=n-i+1; | ^~~~ main.cpp:74:29: warning: unused variable 'dif2' [-Wunused-variable] 74 | int dif2=m-j+1; | ^~~~