#include<stdio.h>
#define NUM 100000

int A[NUM],n;

int partition(int p, int r){
  int x,i,j,key;

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

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

  key = A[i+1];
  A[i+1] = A[r];
  A[r] = key;

  return i+1;
}

int main(){
  int i,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[q]);

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

  printf("%d\n",A[n-1]);

  return 0;
}