#include<stdio.h>
#define MAX 100001

int main(){
  int i,A[MAX],n,q;

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

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