#include<stdio.h>
#define MAX 100000

int partition(int ,int);
int A[MAX];

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

    value=partition(0,n-1);

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

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

