#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;

  sanf("%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;
}
