#include<stdio.h>

#define MAX 100000

int partition(int p, int r);

int A[MAX],n;

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 > 0) printf(" ");
  
    if(i == q) printf("[");

    printf("%d",A[i]);

    if(i == q) printf("]");
  }
  
  printf("\n");
  
  return 0;
}

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

