#include<stdio.h>
#define MAX 100000

int A[MAX], n;

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

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