#include <stdio.h>
#define MAX 100000

int A[MAX];

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

    return i + 1;
}


int main(int argc, char const *argv[])
{
    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) printf(" ");
        if (i == q) printf("[");
        printf("%d", A[i]);
        if (i == q) printf("]");
    }

    return 0;
}


