foo.cc: In function 'int fz(int, int, int)':
foo.cc:8:7: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  mid=l+r>>1;
      ~^~
foo.cc:39:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

自豪的采用 HydroJudge 进行评测(github.com/hydro-dev/HydroJudge)

{"receive":"2020-07-10T07:27:17.603Z","handle":"2020-07-10T07:27:17.603Z","cache_start":"2020-07-10T07:27:17.611Z","read_cases":"2020-07-10T07:27:17.753Z","judge":"2020-07-10T07:27:17.754Z","done":"2020-07-10T07:27:19.188Z"}