foo.cc: In function ‘bool cmp(cj, cj)’:
foo.cc:22:45: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
   22 |         return a.zf()>b.zf()||a.zf()==b.zf()&&a.ys()>b.ys()||a.zf()==b.zf()&&a.ys()==b.ys()&&a.smax()>b.smax();
      |                               ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
foo.cc:22:92: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
   22 |         return a.zf()>b.zf()||a.zf()==b.zf()&&a.ys()>b.ys()||a.zf()==b.zf()&&a.ys()==b.ys()&&a.smax()>b.smax();
      |                                                              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~