#include<stdio.h>

int partition(int *,int ,int );

int main(){
  int i, j, n, 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(i == p){
      printf("[%d] ",A[i]);
    }else{
      printf("%d ",A[i]);

          }
  }
  printf("\n");
  
  return 0;
}

int partition(int *A,int  p,int  r){
  
  int i, j, x, tmp;

  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;
}

