#define _CRT_SECURE_NO_WARNINGS
#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;
}