Compilare: user.cpp: In function ‘void addEdge(int, int)’: user.cpp:18:39: warning: narrowing conversion of ‘g[j].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >()’ from ‘std::vector<Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] Edge a = {j, 0, c[i][j], g[j].size()}; ~~~~~~~~~^~ user.cpp:19:39: warning: narrowing conversion of ‘g[i].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >()’ from ‘std::vector<Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] Edge b = {i, 0, c[j][i], g[i].size()}; ~~~~~~~~~^~ user.cpp: In function ‘int dfs(int, int)’: user.cpp:46:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int &i = rem[from]; i < g[from].size(); i ++) { ~~^~~~~~~~~~~~~~~~