#include <stdio.h>

#define N 100000

int partition(int *, int, int);

int main(){

  int i;
  int n;
  int q;
  int A[N];
  
    scanf("%d",&n);

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

int partition(int *A,int p,int r){

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