Eroare de compilare: user.cpp: In function ‘void merge_nod(NOD&, NOD&, NOD&)’: user.cpp:34:5: error: ‘v’ was not declared in this scope v.pr.clear(); ^ user.cpp:40:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(poz1 < v1.size() && poz2 < v2.size()) { ^ user.cpp:40:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(poz1 < v1.size() && poz2 < v2.size()) { ^ user.cpp: In function ‘int main()’: user.cpp:80:13: warning: unused variable ‘a’ [-Wunused-variable] int a = lower_bound(x.begin(), x.end(), it.fi) - x.begin(); ^ user.cpp:81:13: warning: unused variable ‘b’ [-Wunused-variable] int b = lower_bound(y.begin(), y.end(), it.se) - y.begin(); ^