#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;
}