#include<stdio.h>
#define MAX 100000

int partition(int, int);
int A[MAX];

int main(){
  int n,i,r,k;

  scanf("%d",&n);

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

  k = partition(0,n-1);

  for(i = 0 ; i < n ; i++){
    if(i > 0) printf(" ");
    if(i == k) printf("[");
    printf("%d",A[i]);
    if(i == k) printf("]");
  }
  printf("\n");

  return 0;
}


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

  return r+1;
}

