#include<stdio.h>
#define N 100000

int partition(int *,int, int);

int main(){
  int i,j,n;
  int A[N];

  scanf("%d",&n);

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

  j = partition(A,0,n - 1);

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

  printf("\n");

  return 0;
}

int partition(int A[],int p,int q){
  int x,i,j,t;
  x = A[q];
  i = p - 1;

  for(j = p;j < q ;j++){
    if(A[j] <= x){
      i++;
      t = A[i];
      A[i] = A[j];
      A[j] = t;
    }
  }
  t = A[i + 1];
  A[i + 1] = A[q];
  A[q] = t;
  return i + 1;
}
