Compilare: user.cpp: In function ‘int put(int)’: user.cpp:31:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(a+p<sol.size()&&sol[p+a]<=x)p+=a; ~~~^~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:47:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<F.size();++i) ~^~~~~~~~~