foo.cc: In function 'int main()':
foo.cc:7:9: warning: unused variable 'xh' [-Wunused-variable]
     int xh;                         
         ^
foo.cc:29:13: warning: 'tt' may be used uninitialized in this function [-Wmaybe-uninitialized]
     cout<<tt;
             ^

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

{"receive":"2020-03-30T05:33:03.550Z","handle":"2020-03-30T05:33:03.550Z","cache_start":"2020-03-30T05:33:03.556Z","read_cases":"2020-03-30T05:33:03.677Z","judge":"2020-03-30T05:33:03.677Z","done":"2020-03-30T05:33:04.006Z"}