Compilare: user.cpp: In function ‘void addedge(int, int, int, int)’: user.cpp:21:33: warning: narrowing conversion of ‘g[y].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >()’ from ‘std::vector<Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] g[x].push_back({y , g[y].size() , 0 , cap , cost}); ^ user.cpp:22:35: warning: narrowing conversion of ‘(g[x].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >() + 4294967295u)’ from ‘std::vector<Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] g[y].push_back({x , g[x].size() - 1 , 0 ,0 , -cost}); ^ user.cpp: In function ‘void bfs()’: user.cpp:37:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < g[node].size() ;i++){ ^ user.cpp: In function ‘void dijkstra()’: user.cpp:72:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h = 0 ; h < g[node].size() ;h++){ ^