#include<stdio.h>

#define N 100000

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

int main(){
  int m,A[N];
  int i,x;
  
  scanf("%d",&m);
  for(i=0;i<m;i++){
    scanf("%d",&A[i]);
  }
  x=partition(A, 0, m-1);
  
  for(i=0;i<m;i++){
    if(i==x) printf("[%d]",A[x]);
    else printf("%d",A[i]);
    if(i<m-1) printf(" ");
  }
  
  printf("\n");
  
  return 0;
}

