/in/foo.cc: In constructor 'Treap::node::node()':
/in/foo.cc:34:51: 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:174:5: warning: no return statement in function returning non-void [-Wreturn-type]
     }
     ^