#include<stdio.h>
#define N 100000
int A[N],n;
int partition(int,int);
int main(void){
  int i,ans;
  scanf("%d",&n);
  for(i=0;i<n;i++) scanf("%d",&A[i]);
  ans=partition(0,n-1);
  for(i=0;i<n;i++){
    if (i==ans) printf("[%d] ",A[i]);
    else printf("%d ",A[i]);
  }
  printf("%d\n",A[i]);
}
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 +=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;
}
