foo.cc: In member function ‘bool Node::operator<(Node)’:
foo.cc:9:53: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
    9 |                 return tot()>y.tot()||tot()==y.tot()&&ch>y.ch||tot()==y.tot()&&ch==y.ch&&id<y.id;
      |                                       ~~~~~~~~~~~~~~^~~~~~~~~
foo.cc:9:88: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
    9 |                 return tot()>y.tot()||tot()==y.tot()&&ch>y.ch||tot()==y.tot()&&ch==y.ch&&id<y.id;
      |                                                                ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~