/in/foo.cc: In function 'bool cmp(xpy, xpy)':
/in/foo.cc:10:37: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   10 |         return x.yw>y.yw||x.yw==y.yw&&x.sx>y.sx;
      |                           ~~~~~~~~~~^~~~~~~~~~~