/in/foo.cc: In function 'int merge(int, int)':
/in/foo.cc:10:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  if(!x||!y)return x^y;down(x);down(y);
  ^~
/in/foo.cc:10:23: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
  if(!x||!y)return x^y;down(x);down(y);
                       ^~~~