#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;
}

