/in/foo.cc: In function 'int main()':
/in/foo.cc:61:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (ll i2=0;i2<vec[f[i]-1].size();i2++){
                ~~^~~~~~~~~~~~~~~~~~~
/in/foo.cc:76:19: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
  printf("%d",dp[n]);
                   ^