/in/foo.cc: In function 'bool cmp(st, st)':
/in/foo.cc:10:37: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   10 |         return a.zf>b.zf||a.zf==b.zf&&a.yw>b.yw||
      |                           ~~~~~~~~~~^~~~~~~~~~~
/in/foo.cc:11:38: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   11 |                a.zf==b.zf&&a.yw==b.yw&&a.xh<b.xh;
      |                ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~