Compilare: user.cpp: In function ‘void addedge(int, int)’: user.cpp:21:41: 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, cap[i][j], 0, g[j].size()}; ~~~~~~~~~^~ user.cpp:22:41: 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, cap[j][i], 0, g[i].size()}; ~~~~~~~~~^~ user.cpp: In function ‘int bfs()’: user.cpp:41:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[from].size(); i ++) { ~~^~~~~~~~~~~~~~~~