#include <stdio.h>
#define MAX 100000

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

  return i+1;
}

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

  p = partition(0,n-1);

  for(i = 0; i < p; i++){
    printf("%d ",A[i]);
  }

  printf("[%d]",A[p]);
  
  for(i = p + 1; i < n; i++){
    printf(" %d",A[i]);
  }
  printf("\n");

  return 0;
}