#include<stdio.h>
#define MAX 100000

int A[MAX],n;
int partition(int,int);

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<n;i++){
    if(i)printf(" ");
    if(i==q)printf("[");
    printf("%d",A[i]);
    if(i==q)printf("]");
  }
  printf("\n");

  return 0;
}

int partition(int p,int r){
  int x, i, j, tmp;
  x = A[r];
  i = p - 1;
  for(j=p;j<r;j++){
    if(A[j] <= x){
      i++;
      tmp = A[i];
      A[i] = A[j];
      A[j] = tmp;
    }
  }
  tmp = A[i+1];
  A[i+1] = A[r];
  A[r] = tmp;

  return i+1;
}