#include<stdio.h>
#define MAX 100000

int A[MAX],n;

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

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)printf(" ");
    if(i == q)printf("[");
    printf("%d",A[i]);
    if(i == q)printf("]");
  }
  printf("\n");
  return 0;
}

