/in/foo.cc: In function 'int main()':
/in/foo.cc:51:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     if (f[i]+max(g[i],h[i])==maxx)//过该点最长链==直径 即在直径上  
     ^~
/in/foo.cc:53:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
  return 0;
  ^~~~~~