Compilare: user.cpp: In function ‘void addedge(int, int, int, int)’: user.cpp:44:30: 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 direct = {j, g[j].size(), 0, cap, cost}; ~~~~~~~~~^~ user.cpp:45:31: 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(), 0, 0, -cost}; ~~~~~~~~~^~ user.cpp: In function ‘void bf()’: user.cpp:63:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[from].size(); i++) { ~~^~~~~~~~~~~~~~~~ user.cpp: In function ‘void dijkstra()’: user.cpp:93:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[from].size(); i++) { ~~^~~~~~~~~~~~~~~~