/in/foo.cc: In function 'void sol(int)':
/in/foo.cc:72:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int l=0;l<e[k].q.size();++l)
                ~^~~~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:99:33: warning: format '%lld' expects argument of type 'long long int', but argument 2 has type 'std::set<int>::size_type {aka long unsigned int}' [-Wformat=]
   printf("%lld\n",ans1[i].size());
                                 ^
/in/foo.cc:101:32: warning: format '%lld' expects argument of type 'long long int', but argument 2 has type 'std::set<int>::size_type {aka long unsigned int}' [-Wformat=]
   printf("%lld ",ans2[i].size());
                                ^