#include<stdio.h>

int partition(int *A,int p,int r){
  int x,i,j,tmp;

  x=A[r];
  i=p-1;
  for(j=p;j<r;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,i,p,r,c;
  scanf("%d",&n);
  int A[n];

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

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

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

  printf("\n");
  
  return 0;
}

