#include <stdio.h>
#include <stdlib.h>
#define MAX 100000

int n, A[MAX];
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 == q)printf("[");
    printf("%d",A[i]);
    if(i == q)printf("]");
    if(i < n - 1)printf(" ");
  }
  return 0;
}

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

