#include<stdio.h>
#define MAX 100000

int A[MAX], n;

int partition(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 t = A[i]; A[i] = A[j]; A[j] = t;
    }
  }
  int t = A[i+1]; A[i+1] = A[r]; A[r] = t;
  return i+1;
}

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

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

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

  return 0;
}

