Compilare: main.cpp: In function 'int main()': main.cpp:24:13: warning: unused variable 'left' [-Wunused-variable] 24 | int n,m,left,right,dif=0,difc,l,c,l2,c2,i,j; | ^~~~ main.cpp:24:18: warning: unused variable 'right' [-Wunused-variable] 24 | int n,m,left,right,dif=0,difc,l,c,l2,c2,i,j; | ^~~~~