Compilare: user.cpp: In function ‘int main()’: user.cpp:69:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v.size();i++) ^ user.cpp:59:22: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] v[poz].second=v[poz].second+nr; ^