foo.cc: In function 'int main()':
foo.cc:4:22: warning: variable 'd' set but not used [-Wunused-but-set-variable]
     int a[10000],b,c,d=1,i;
                      ^

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