#include <stdio.h>

int partition(int *, int , int);

#define N 100000

int main(){

  int A[N], i, j=0, n, key, k;

  scanf("%d",&n);

  for(i=0;i<n;i++)scanf("%d",&A[i]);

  i = partition(A, 0, n-1);

 printf(" ");
  for(j=0;j<n;j++){
    if(j==i)printf(" [%d]",A[i]);
    else printf(" %d",A[j]);
  }
  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;j++){
    if(A[j]<=x){
      i = i+1;
      tmp = A[i];
      A[i] = A[j];
      A[j] = tmp;
    }
  }
  tmp = A[r];
  A[r] = A[i+1];
  A[i+1] = tmp;


 return i+1;
}