Compilare: user.cpp: In function ‘int cadran(std::vector<std::pair<int, int> >)’: user.cpp:17:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1;i<a.size();i++) { ^ user.cpp:16:9: warning: unused variable ‘dim’ [-Wunused-variable] int dim = a.size(); ^ user.cpp: In function ‘int main()’: user.cpp:61:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<b.size();i++) ^ user.cpp:64:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<c.size();i++) ^ user.cpp:67:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<d.size();i++) ^