/in/foo.cc: In function 'void sp()':
/in/foo.cc:28:11: warning: overflow in implicit constant conversion [-Woverflow]
   dist[i]=100000000000;
           ^~~~~~~~~~~~
/in/foo.cc:36:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<to[cur].size();i++){
               ~^~~~~~~~~~~~~~~