#include <stdio.h>
#include <stdlib.h>

int partition(int *, int, int);

int main(){
  int *A;
  int n, i, q;
  
  scanf("%d",&n);
  A = malloc(n * sizeof(int));
  for(i = 0; i < n; i++){
    scanf("%d",&A[i]);
  }
  q = partition(&A[0], 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 *A, int p, int r){
  int x, i, j, 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[j];
  A[j] = temp;
  
  return i + 1;
}

