#include <stdio.h>

#define NMAX 100000

int partition(int *,int,int);

int main(void){

  int n,i,p;
  int A[NMAX];

  scanf("%d",&n);
  for(i = 0;i < n;i++){
    scanf("%d",&A[i]);
  }
  p = partition(A,0,n-1);

  for(i = 0;i < p;i++){
    printf("%d ",A[i]);
  }
  printf("[%d] ",A[p]);
  for(i = p + 1;i < n;i++){
    if(i == n - 1){
      printf("%d\n",A[i]);
    }else{
      printf("%d ",A[i]);
    }
  }

  return 0;
}

int partition(int *A,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;
  
}

