#include<stdio.h>
#define MAX 100000

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

  return i+1;
}

int main(){
  int A[MAX];
  int n, i, q;

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

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

  for(i = 0; i < n; i++){
    if(i >= 1) printf(" ");
    if(i == q) printf("[");
    printf("%d", A[i]);
    if(i == q) printf("]");
  }
  printf("\n");

  return 0;
}

