#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;
}
