foo.cc: In function 'int fz(int, int, int)':
foo.cc:28:7: warning: statement has no effect [-Wunused-value]
    mid+1;
    ~~~^~
foo.cc:33:7: warning: statement has no effect [-Wunused-value]
    mid-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":"2020-07-10T07:27:41.375Z","handle":"2020-07-10T07:27:41.375Z","cache_start":"2020-07-10T07:27:41.381Z","read_cases":"2020-07-10T07:27:41.522Z","judge":"2020-07-10T07:27:41.523Z","done":"2020-07-10T07:27:42.921Z"}