foo.cc: In function 'int main()':
foo.cc:4:15: warning: unused variable 'j' [-Wunused-variable]
 int a,n,m,t,i,j,o;
               ^
foo.cc:13:7: warning: 't' may be used uninitialized in this function [-Wmaybe-uninitialized]
 cout<<t<<endl;
       ^

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

{"receive":"2020-07-11T18:44:25.489Z","handle":"2020-07-11T18:44:25.489Z","cache_start":"2020-07-11T18:44:25.496Z","read_cases":"2020-07-11T18:44:25.629Z","judge":"2020-07-11T18:44:25.630Z","done":"2020-07-11T18:44:26.760Z"}