#include <stdio.h>
  
int Partition(int* A,int p,int r);
  
main(){
  int n,i,p,A[100000];
  scanf("%d",&n);
  
  for(i=0;i<n;i++){
    scanf("%d",&A[i]);
  }
  
  p = Partition(A,0,n-1);
  
  for(i=0;i<n;i++){
    if(p==i)printf("[%d]",A[i]);
    else printf("%d",A[i]);
if(i!=n-1) printf(" ");
  }
  printf("n");
  
  return 0;
}
  
int Partition(int* A,int p, int r){
  
  int x, i,j, tmp;
  
  x = A[r];
  i = p-1;
  for(j=p; j<=r-1; j++){
  
    if(A[j] <= x){
      i++;
      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;
  
}