Compilare: main.cpp: In function 'void DFS(int, int)': main.cpp:31:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for(int x=0; x<v[nod].size(); ++x) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int Query(int, int, int, int)': main.cpp:81:1: warning: control reaches end of non-void function [-Wreturn-type] 81 | } | ^