Compilare: main.cpp: In function 'void dfs(int)': main.cpp:13:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for(int i=0;i<G[x].size();i++) | ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:22:9: warning: unused variable 'i' [-Wunused-variable] 22 | int i,j,x,y; | ^ main.cpp:22:11: warning: unused variable 'j' [-Wunused-variable] 22 | int i,j,x,y; | ^