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

int partition(int,int);

int A[100000];
int main(){
  int i,j,n;
  
  scanf("%d",&n);
  for(i=0;i<n;i++){
    scanf("%d",&A[i]);
  }
  
  j = partition(0,n-1);

  for(i=0;i<n;i++){
    if(i == j && i == n-1) printf("[%d]",A[i]);
    else if(i == j)printf("[%d] ",A[i]);
    else if(i == n-1)printf("%d",A[i]);
    else printf("%d ",A[i]);
  }
  printf("\n");
  
  return 0;
}

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

