#include<stdio.h>
#define MAX 100001

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++;
      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;
}


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

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

