Compilare: user.cpp: In function ‘void addedge(int, int)’: user.cpp:50:31: 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(), false}; ^ user.cpp:51:32: 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 inverse = {i, g[i].size(), false}; ^ user.cpp: In function ‘void write()’: user.cpp:80:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= sol.size() - 1; i++){ ^