Compilare: main.cpp: In function 'int main()': main.cpp:71:15: warning: unused variable 'k' [-Wunused-variable] 71 | int n,i,j,k,l,t,op,a,b; | ^ main.cpp:71:17: warning: unused variable 'l' [-Wunused-variable] 71 | int n,i,j,k,l,t,op,a,b; | ^