#include <stdio.h>

int  partition(int *,int,int);

int main(){
  int A[100000];
  int i,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;i++){

    if(i)printf(" ");

    if(i==q)printf("[");

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

    if(i==q)printf("]");

  }

  printf("\n");

  return 0;
}

int partition(int A[],int p,int r){
  int x=0;
  int i=0;
  int j;
  int temp=0;

  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;
}
 
      


