#include<stdio.h>
#define MAX 100000

int A[MAX];

int partition(int p,int r){
  int q,i,j,a,b;
  q = A[r];
  i = p-1;
  for(j=p; j<r; j++){
    if (A[j] <= q){
      i = i+1;
      a = A[i];
      A[i] = A[j];
      A[j] = a;
    }
  }
  b = A[i+1];
  A[i+1] = A[r];
  A[r] = b;
  return i+1;
}

int main(){
  int i,n,q;

  scanf("%d",&n);

  for(i=0; i<n; i++) scanf("%d",&A[i]);

  q = partition(0,n-1);

  for(i=0; i<q; i++) printf("%d ",A[i]);
  printf("[%d] ",A[i]);
  for(i=q+1; i<n-1; i++) printf("%d ",A[i]);
  printf("%d\n",A[i]);

  return 0;
}

