/in/foo.cc: In function 'int main()':
/in/foo.cc:13:15: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
  scanf("%d",&n);
               ^
/in/foo.cc:22:16: warning: 'id' may be used uninitialized in this function [-Wmaybe-uninitialized]
    p[i]=min(p[2*id-i],mx-i);
               ~^~~