/in/foo.cc:4:0: warning: ignoring #pragma comment  [-Wunknown-pragmas]
 #pragma comment(linker, "/STACK:36777216")
 
/in/foo.cc: In function 'void dfs(int, int)':
/in/foo.cc:483:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=0;i<adj[u].size();++i) if (v != p){
                  ~^~~~~~~~~~~~~~