Compilare: main.cpp: In function 'int main()': main.cpp:54:25: warning: unused variable 'dif1' [-Wunused-variable] 54 | int dif1=n-i+1; | ^~~~ main.cpp:65:25: warning: unused variable 'dif1' [-Wunused-variable] 65 | int dif1=m-j+1; | ^~~~ main.cpp:80:29: warning: unused variable 'dif1' [-Wunused-variable] 80 | int dif1=n-i+1; | ^~~~ main.cpp:81:29: warning: unused variable 'dif2' [-Wunused-variable] 81 | int dif2=m-j+1; | ^~~~