Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:19:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for(int i=0;i<ad[x].size();i++) | ~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:39:8: warning: 'rad' may be used uninitialized [-Wmaybe-uninitialized] 39 | dfs(rad,0); | ~~~^~~~~~~ main.cpp:25:15: note: 'rad' was declared here 25 | int n,a,b,rad; | ^~~