#include <stdio.h>
#define N 100000

int partition(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++;
      tmp = A[i];
      A[i] = A[j];
      A[j] = tmp;
		}
	}
	tmp = A[r];
	A[r] = A[i+1];
	A[i+1] = tmp;

	return i+1;
}

int main(){
  int x,n,i,A[N];

  scanf("%d",&n);

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

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

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

  printf("\n");

  return 0;
}
