/in/foo.cc: In function 'bool cmp(Point, Point)':
/in/foo.cc:31:18: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
     if (t>0||t==0&&dirc(p1,bian[0])<=dirc(p2,bian[0])) return true;
              ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc: In function 'int tubao(int)':
/in/foo.cc:83:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^