#include<stdio.h>
#define MAX 100000
int A[MAX],n;

int Partition(int p,int r){
  int x,i,j,k=0;
  
  x = A[r];
  i = p-1;
  for(j=p;j<r;j++){
    if(A[j]<=x){
      i++;
      k=A[i];
      A[i]=A[j];
      A[j]=k;
    }
  }
  k=A[i+1];
  A[i+1]=A[r];
  A[r]=k;
  return i+1;
}

int main(){
  int i,q;

  scanf("%d",&n);
  for(i=0;i<n;i++)scanf("%d",&A[i]);
  
  q=Partition(0,n-1);
  
  for(i=0;i<n;i++){
    if(i)printf(" ");
    if(i==q)printf("[");
    printf("%d",A[i]);
    if(i==q)printf("]");
  }
  printf("\n");
  
  return 0;
}