#include<stdio.h>
#define M 100000

int partition(int A[], int n, int p, int r){
  int x, i, j, k;
  x = A[r];
  i = p - 1;
  for ( j = p; j < r; j++ ){
    if ( A[j] <= x ){
      i++;
      k = A[i]; A[i] = A[j]; A[j] = k;
    }
  }
  k = A[i+1]; A[i+1] = A[r]; A[r] = k;
  return i+1;
}

main(){
  int A[M], n, i, q;
  scanf("%d", &n);
  for ( i = 0; i < n; i++ ) scanf("%d", &A[i]);
  q = partition(A, n, 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;
}

