foo.cc: In function 'int main()':
foo.cc:54:21: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
  while(scanf("%d",&n)==1)
                   ~~^

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