#include <stdio.h>
#define MAX 100000

int A[MAX];

int Partition(int A[] ,int p,int r){

  int x,tmp,i,j;

  x = A[r];
  i = p-1;

  for(j=p;j<=r-1;j++){
    if(A[j]<=x){
      i++;
      tmp = A[i];
      A[i] = A[j];
      A[j] = tmp; 
    }
  }
    tmp=A[i+1];
    A[i+1]=A[r];
    A[r]=tmp;

    return i+1;
}

int main(){

  int n,x,i,j;

  scanf("%d",&n);

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

  x = Partition(A,0,n-1);

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

  return 0;
}