#include <stdio.h>

int n;
int A[100000];//記録用の外部配列

int partition(int ,int);

int main(){
  int i;
  int index;
  
  scanf("%d", &n);
  for(i = 0;i < n; i++){
    scanf("%d", &A[i]);
  }
  
  index = partition(0, n - 1);
  
  for(i = 0;i < n; i++){
    if(i == index){
      printf("[%d]",A[i]);
    }else{
      printf("%d",A[i]);
    }
    //空白作成
    if(i < n - 1) printf(" ");
  }
  
  printf("\n");
  return 0;
}

int partition(int p, int r){
  int i, j;
  int x, 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;
}

