Compilare: user.cpp: In function ‘int main()’: user.cpp:45:68: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int j = poz; p[j].first == p[i].second && j < p.size(); ++j ) ^ user.cpp:45:31: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] for ( int j = poz; p[j].first == p[i].second && j < p.size(); ++j ) ^