Compilare: user.cpp: In function ‘int main()’: user.cpp:55:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<q.size(); j++) ^ user.cpp: In function ‘bool found(int, int)’: user.cpp:29:1: warning: control reaches end of non-void function [-Wreturn-type] } ^