Compilare: user.cpp: In function ‘int main()’: user.cpp:67:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int it = 0; it<sol.size(); ++ it) cout<<sol[it] << '\n'; ^ user.cpp:42:10: warning: unused variable ‘mn’ [-Wunused-variable] int N,i,mn,last,dv,t; ^ user.cpp:42:13: warning: unused variable ‘last’ [-Wunused-variable] int N,i,mn,last,dv,t; ^ user.cpp:42:18: warning: unused variable ‘dv’ [-Wunused-variable] int N,i,mn,last,dv,t; ^ user.cpp:42:21: warning: unused variable ‘t’ [-Wunused-variable] int N,i,mn,last,dv,t; ^