#define N 100000

int partition(int*,int,int);

int main(){
  int n,i,A[N],q;

  scanf("%d",&n);
  for(i = 0; i < n; i++)
    scanf("%d",&A[i]);
  q = partition(A,0,n-1);
  for(i = 0; i < n; i++) {
    if(i>0) printf(" ");
    if(i==q) printf("[");
    printf("%d",A[i]);
    if(i==q) printf("]");
  }
  printf("\n");
  return 0;
}

int partition(int A[],int p,int r){
  int x,i,j,a,b;

  x = A[r];
  i = p - 1;

  for(j = p; j <= r-1; j++){
    if(A[j] <= x){
      i = i + 1;
      a = A[j];
      A[j] = A[i];
      A[i] = a;
    }
  }
  b = A[r];
  A[r] = A[i+1];
  A[i+1] = b;

  return i+1;
  
}