Compilare: main.cpp: In function 'void dfs(ll)': main.cpp:29:17: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for(ll i=0;i<edg[u].size();i++){ | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:37:35: warning: unused variable 'ans' [-Wunused-variable] 37 | ll n=read(),m=read(),s=read(),ans=0; | ^~~