Compilare: main.cpp: In function 'int main()': main.cpp:90:25: warning: unused variable 'dif1' [-Wunused-variable] 90 | int dif1=n-i+1; | ^~~~ main.cpp:101:25: warning: unused variable 'dif1' [-Wunused-variable] 101 | int dif1=m-j+1; | ^~~~ main.cpp:116:29: warning: unused variable 'dif1' [-Wunused-variable] 116 | int dif1=n-i+1; | ^~~~ main.cpp:117:29: warning: unused variable 'dif2' [-Wunused-variable] 117 | int dif2=m-j+1; | ^~~~