Compilare: main.cpp: In function 'void DFS(int, int)': main.cpp:21:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(int x=0;x<v[nod].size();++x) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:98:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 98 | for(int i=0;i<v[x].size();++i) | ~^~~~~~~~~~~~ main.cpp:114:19: warning: 'semn' may be used uninitialized in this function [-Wmaybe-uninitialized] 114 | Update(1 , 1 , n , inceput[y] , sfarsit[y] , semn*nrup); | ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~