/in/foo.cc: In function 'int main()':
/in/foo.cc:37:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<g[now].size();i++) 
               ~^~~~~~~~~~~~~~
/in/foo.cc:50:27: warning: unused variable 'temp' [-Wunused-variable]
    int timenow=0,cur=s[i],temp=ans[mid[i]];
                           ^~~~