Eroare de compilare: main.cpp: In function 'void dfs(int)': main.cpp:24:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v[nod].size() && !found; ++i) ~^~~~~~~~~~~~~~ main.cpp: In function 'void build(int)': main.cpp:49:19: error: reference to 'next' is ambiguous nod = next[nod]; ^~~~ main.cpp:10:25: note: candidates are: std::vector<int> next vector <int> v[2*nmax], next(2*nmax), sol; ^~~~ In file included from /usr/include/c++/6/bits/stl_algobase.h:66:0, from /usr/include/c++/6/bits/char_traits.h:39, from /usr/include/c++/6/ios:40, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/sstream:38, from /usr/include/c++/6/complex:45, from /usr/include/c++/6/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52, from main.cpp:1: /usr/include/c++/6/bits/stl_iterator_base_funcs.h:205:5: note: template<class _ForwardIterator> _ForwardIterator std::next(_ForwardIterator, typename std::iterator_traits<_Iter>::difference_type) next(_ForwardIterator __x, typename ^~~~ main.cpp: In function 'void solve_case()': main.cpp:76:9: error: reference to 'next' is ambiguous next[x] = y; ^~~~ main.cpp:10:25: note: candidates are: std::vector<int> next vector <int> v[2*nmax], next(2*nmax), sol; ^~~~ In file included from /usr/include/c++/6/bits/stl_algobase.h:66:0, from /usr/include/c++/6/bits/char_traits.h:39, from /usr/include/c++/6/ios:40, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/sstream:38, from /usr/include/c++/6/complex:45, from /usr/include/c++/6/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52, from main.cpp:1: /usr/include/c++/6/bits/stl_iterator_base_funcs.h:205:5: note: template<class _ForwardIterator> _ForwardIterator std::next(_ForwardIterator, typename std::iterator_traits<_Iter>::difference_type) next(_ForwardIterator __x, typename ^~~~ main.cpp:77:9: error: reference to 'next' is ambiguous next[y] = x; ^~~~ main.cpp:10:25: note: candidates are: std::vector<int> next vector <int> v[2*nmax], next(2*nmax), sol; ^~~~ In file included from /usr/include/c++/6/bits/stl_algobase.h:66:0, from /usr/include/c++/6/bits/char_traits.h:39, Non zero exit status: 1