#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[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 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;
}

