#include <stdio.h>

#define MAX 100000

int A[MAX];

int partition(int p, int r)
{
    int x = A[r];
    int i = p - 1;

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

    i++;
    int tmp = A[i];
    A[i] = A[r];
    A[r] = tmp;
    return i;
}

int main()
{
    int n;

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

    int q = partition(0, n - 1);

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

    return 0;
}
