#include<stdio.h>
#include<stdlib.h>
int partition(int*, int, int);
int main(){
  int n, *A, i, temp;
  scanf("%d",&n);
  A = (int *)malloc(sizeof(int) * n);
  for(i=0; i<n; i++)
    scanf("%d",&A[i]);
  temp = partition(A, 0, n-1);
  for(i=0; i<n; i++){
    if(i == temp)printf("[");
    printf("%d",A[i]);
    if(i == temp)printf("]");
    i!=n-1 ? printf(" ") : printf("\n");
  }
  free(A);
  return 0;
}

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