Compilare: user.cpp: In function ‘int main()’: user.cpp:41:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i!=m.size()) ~^~~~~~~~~~ user.cpp:53:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<fn.size();i++) ~^~~~~~~~~~ user.cpp: In function ‘int Find(int)’: user.cpp:16:1: warning: control reaches end of non-void function [-Wreturn-type] } ^