#include<stdio.h>
#define MAX 100000

int partition(int A[], int n, int p, int r);

int main() {
	int  i, n, m, A[MAX];
  	scanf("%d", &n) ;
  	for ( i = 0; i < n; i++ ) {
  		scanf("%d", &A[i]) ;
  	}
  	m = partition(A, n, 0, n-1);

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

  return 0;
}

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