#include <stdio.h>
#include <stdlib.h>
#define N 100000
 
int Partition(int,int);
int A[N];
 
int main(void){  
  int i,n,p=0,r,mid;
     
  scanf("%d",&n);
  for(i=0;i<n;i++) scanf("%d",&A[i]);
     
  r=n-1;
  mid=Partition(p,r);
     
   
  for(i=0;i<mid;i++) printf("%d ",A[i]);   
  
  printf("[%d] ",A[mid]);
  
  for(i=mid+1;i<n;i++){
    printf("%d",A[i]);
    if(i!=n-1)printf(" ");
  }
  printf("\n");
     
  return 0;
}

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

