Compilare: main.cpp: In function 'void Dijkstra()': main.cpp:84:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < adj[node].size(); i++) ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:114:34: warning: narrowing conversion of '(& v.std::vector<_Tp, _Alloc>::operator[]<std::__cxx11::basic_string<char>, std::allocator<std::__cxx11::basic_string<char> > >(((std::vector<std::__cxx11::basic_string<char> >::size_type)(i - 1))))->std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size<char, std::char_traits<char>, std::allocator<char> >()' from 'std::__cxx11::basic_string<char>::size_type {aka long unsigned int}' to 'int' inside { } [-Wnarrowing] pq.push({i, v[i - 1].size(), (1 << i)}); ~~~~~~~~~~~~~^~