#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;
}

int main(){
    int i, q;
    scanf("%d", &n);
    for (i = 0;  i<n ; i++) {
        scanf("%d", &n);
    }
    q = partition(0, n-1);
    for (int j = 0; j < n; ++j) {
        if (i) printf(" ");
        if (i == q) printf("[");
        printf("%d", A[i]);
        if (i == q) printf("]");
    }
    printf("\n");
    return 0;
}

