#include<stdio.h>
#define max 100000

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


int main(){
  int n,i,p,q,r;
  int A[max];

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

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

  return 0;
}

