#include <stdio.h>
#define MAX 100000

int A[MAX], n;

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