foo.cc: In function 'void gao(int, int, int)':
foo.cc:8:11: warning: unused variable 'b' [-Wunused-variable]
     int a,b,c=0,y=x;
           ^
foo.cc: In function 'void get_sg(int)':
foo.cc:16:13: warning: unused variable 'c' [-Wunused-variable]
     int a,b,c;
             ^
foo.cc: In function 'int main()':
foo.cc:35:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&T);
     ~~~~~^~~~~~~~~
foo.cc:39:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&n,&q);
         ~~~~~^~~~~~~~~~~~~~
foo.cc:43:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d",&b);
             ~~~~~^~~~~~~~~

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

{"receive":"2020-08-12T14:21:09.650Z","handle":"2020-08-12T14:21:09.650Z","cache_start":"2020-08-12T14:21:09.671Z","read_cases":"2020-08-12T14:21:09.826Z","judge":"2020-08-12T14:21:09.830Z","done":"2020-08-12T14:21:12.759Z"}