#include<stdio.h>
 
#define N 100001
  
int Partition(int A[],int p,int r);
  
int main(){
  int i,n,A[N],q;
 
  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==q){
      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 A[],int p,int r){
  int i,j,s,t,u;
  s=A[r];
  i=p-1;
  for(j=p;j<=r-1;j++){
    if(A[j]<=s){
      i++;
      t=A[i];
      A[i]=A[j];
      A[j]=t;
    }
  }
  u=A[i+1];
  A[i+1]=A[r];
  A[r]=u;
  return i+1;
}