Compilare: main.cpp: In function 'void addEdge(int, int, const std::vector<std::vector<int> >&, std::vector<std::vector<Edge> >&)': main.cpp:24:45: warning: narrowing conversion of '(&(& g)->std::vector<_Tp, _Alloc>::operator[]<std::vector<Edge>, std::allocator<std::vector<Edge> > >(((std::vector<std::vector<Edge> >::size_type)j)))->std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >()' from 'std::vector<Edge>::size_type {aka long unsigned int}' to 'int' inside { } [-Wnarrowing] g[i].push_back({j, 0, v[i][j], g[j].size()}); ~~~~~~~~~^~ main.cpp:25:48: warning: narrowing conversion of '((&(& g)->std::vector<_Tp, _Alloc>::operator[]<std::vector<Edge>, std::allocator<std::vector<Edge> > >(((std::vector<std::vector<Edge> >::size_type)i)))->std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >() - 1ul)' from 'std::vector<Edge>::size_type {aka long unsigned int}' to 'int' inside { } [-Wnarrowing] g[j].push_back({i, 0, v[j][i], g[i].size() - 1}); ~~~~~~~~~~~~^~~ main.cpp: In function 'int dfs(int, int, const std::vector<int>&, std::vector<int>&, std::vector<std::vector<Edge> >&)': main.cpp:53:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = rem[node]; i < g[node].size(); i ++) { ~~^~~~~~~~~~~~~~~~