Compilare: user.cpp: In function ‘void addedge(int, int)’: user.cpp:27:27: 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 dir = {j, g[j].size(), cap[i][j], 0}; ~~~~~~~~~^~ user.cpp:28:27: 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 inv = {i, g[i].size(), cap[j][i], 0}; ~~~~~~~~~^~ user.cpp: In function ‘bool bfs()’: user.cpp:45:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[from].size(); i ++) { ~~^~~~~~~~~~~~~~~~ user.cpp: In function ‘int dfs(int, int)’: user.cpp:63:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = rem[from]; i < g[from].size(); i ++) { ~~^~~~~~~~~~~~~~~~