/in/foo.cc: In constructor 'Treap::node::node()':
/in/foo.cc:34:45: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   node() { lmx = rmx = mx = sum = re = prio = ls = rs = sz = val = 0, co = INF; }
                                        ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc: In member function 'int Treap::get_sum()':
/in/foo.cc:177:2: warning: no return statement in function returning non-void [-Wreturn-type]
  }
  ^