/in/foo.cc: In function 'int main()':
/in/foo.cc:23:40: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
  for(int i=1;i<=n;i++) scanf("%d",&a[i]),sum[i]=sum[i-1]+a[i];
                                        ^
/in/foo.cc:47:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int k=0;k<b.size();k++)
                 ~^~~~~~~~~
/in/foo.cc:24:6: warning: unused variable 'mm' [-Wunused-variable]
  int mm=sqrt(m); 
      ^~