/in/foo.cc: In function 'node jiafa(node, node)':
/in/foo.cc:37:2: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
  while(n0.len==0 && i>1)
  ^~~~~
/in/foo.cc:39:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while'
   n0.len=i;
   ^~