Compilare: user.cpp: In function ‘void addedge(int, int)’: user.cpp:25:32: 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, 1}; ^ user.cpp:26:40: warning: narrowing conversion of ‘g[(i + n)].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 + n, g[i + n].size(), 0, 0}; ^ user.cpp: In function ‘void read()’: user.cpp:42:42: warning: narrowing conversion of ‘g[(i + n)].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >()’ from ‘std::vector<Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] g[i].push_back({i + n, g[i + n].size(), 0, 1}); ^ user.cpp:43:38: 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] g[i + n].push_back({i, g[i].size(), 0, 0}); ^ user.cpp: In function ‘bool bfs()’: user.cpp:57:37: 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:75:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = rem[from]; i < g[from].size(); i++) { ^