Compilare: user.cpp: In function ‘void addedge(int, int, int)’: user.cpp:40:33: warning: narrowing conversion of ‘(g[j].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >() + ((std::vector<Edge>::size_type)loop))’ from ‘std::vector<Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] Edge direct = {j, g[j].size() + loop, false, false}; ^ user.cpp:41:32: 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 inverse = {i, g[i].size(), false, true}; ^ user.cpp:43:38: warning: narrowing conversion of ‘(road[j].std::vector<_Tp, _Alloc>::size<Edge2, std::allocator<Edge2> >() + ((std::vector<Edge2>::size_type)loop))’ from ‘std::vector<Edge2>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] Edge2 direct2 = {j, road[j].size() + loop, false, false, ind}; ^ user.cpp:44:37: warning: narrowing conversion of ‘road[i].std::vector<_Tp, _Alloc>::size<Edge2, std::allocator<Edge2> >()’ from ‘std::vector<Edge2>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] Edge2 inverse2 = {i, road[i].size(), false, true, ind}; ^ user.cpp: In function ‘void bfs()’: user.cpp:62:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[from].size(); i++){ ^ user.cpp: In function ‘void computesol()’: user.cpp:98:14: warning: unused variable ‘e’ [-Wunused-variable] Edge2 &e = road[a].back(); ^ user.cpp:105:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < road[a].size(); j++){ ^