#include<stdio.h>

#define N 100000

int A[N],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++;
      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(void){

  int i,p;
  
  scanf("%d",&n);
  for(i=0;i<n;i++) scanf("%d",&A[i]);
  p=partition(0,n-1);

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