Compilare: main.cpp: In function 'void Dfs()': main.cpp:10:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 10 | for(nouse = 0; nouse < Qs[x].size(); ++nouse){ | ~~~~~~^~~~~~~~~~~~~~ main.cpp:11:25: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 11 | if(Qs[x][nouse] > now.size() - 1) main.cpp:16:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for(useit = 0; useit < V[x].size(); ++useit){ | ~~~~~~^~~~~~~~~~~~~