#include<stdio.h>

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

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

  return i+1;
  
};

int main(){
  
  int n,a,i;
  
  scanf("%d",&n);

  int A[n];

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

 a = partition(&A[0],0,n-1);

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

  return 0;
}

