#include <stdio.h>
#define MAX 100000

int A[MAX], n;

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

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;
}

