#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[j];
            A[j] = A[i];
            A[i] = t;
        }
    }

    t = A[r];
    A[r] = A[i+1];
    A[i+1] = 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 > 0) printf(" ");
        if (i == q) printf("[");
        printf("%d", A[i]);
        if (i == q) printf("]");
    }
    printf("\n");

    return 0;
}
