#include<stdio.h>
#define MAX 100000
int partition(int *, int, int);

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

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

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

  return 0;
}

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

  return i+1;
}

