foo.cc: In function 'int main()':
foo.cc:5:10: warning: unused variable 'd' [-Wunused-variable]
  int n,t,d,temp,sum=0,a[1000],s,e,f;
          ^
foo.cc:5:12: warning: unused variable 'temp' [-Wunused-variable]
  int n,t,d,temp,sum=0,a[1000],s,e,f;
            ^~~~

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