#include<stdio.h>

#define N 100000

int partition(int*,int,int);

int main(){
  int i,j,a,b,n,A[N];

  scanf("%d",&n);

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

  a=partition(A,0,n-1);

  printf("%d",A[0]);
  for(i=1;i<n;i++){
    if(i==a) printf(" [%d]",A[i]);

    else printf(" %d",A[i]);
  }

  printf("\n");

  return 0;
}

int partition(int *A,int p,int r){
  int x,i,j,temp;

  x=A[r];
  i=p-1;

  for(j=p;j<r;j++){
    if(A[j]<=x){
      i=i+1;
      temp=A[i];
      A[i]=A[j];
      A[j]=temp;
    }
  }

  temp=A[i+1];
  A[i+1]=A[r];
  A[r]=temp;

  return i+1;
}

