#include <stdio.h>
#define MAX 100000

int partition(int*,int,int);

int main(){
  int i, n, q, 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 < n; i++){
    if(i > 0) printf(" ");
    if(q == i) printf("[%d]",A[i]);
    else printf("%d",A[i]);
  }
  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-1; j++){
    if(A[j] <= x){
      i += 1;
      temp = A[j];
      A[j] = A[i];
      A[i] = temp;
    }
  }
  temp = A[r];
  A[r] = A[i+1];
  A[i+1] = temp;

  return i+1;
}