#include<stdio.h>
#define N 100000

int part(int A[],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=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;
}

int main(){

  int i,j,A[N],n,q;

  scanf("%d",&n);

  for(i=0;i<n;i++) scanf("%d",&A[i]);

  q=part(A,0,n-1);

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

  return 0;
}

