/in/foo.cc: In function 'bool cmp(student, student)':
/in/foo.cc:11:57: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   11 |         || a.y+a.sh+a.yi+a.w+a.h==b.y+b.sh+b.yi+b.w+b.h &&
      |            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
   12 |         a.y>b.y) return 1;
      |         ~~~~~~~