#include<stdio.h>
#define N 1000000

int main(){
  int A[N];
  int n,i,center;

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

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

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