Compilare: user.cpp: In function ‘void addedge(int, int)’: user.cpp:30:31: warning: narrowing conversion of ‘g[b].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >()’ from ‘std::vector<Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] Edge direct = {b, g[b].size(), 0, 1}; ^ user.cpp:31:32: warning: narrowing conversion of ‘g[a].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >()’ from ‘std::vector<Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] Edge inverse = {a, g[a].size(), 0, 0}; ^ user.cpp: In function ‘void addedgesp(int)’: user.cpp:38:39: warning: narrowing conversion of ‘g[(x + n)].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >()’ from ‘std::vector<Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] Edge direct = {x + n, g[x + n].size(), 0, 1}; ^ user.cpp:39:32: warning: narrowing conversion of ‘g[x].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >()’ from ‘std::vector<Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] Edge inverse = {x, g[x].size(), 0, 1}; ^ user.cpp: In function ‘bool bfs()’: user.cpp:76:37: 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:94:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = rem[from]; i < g[from].size(); i++) { ^