#include <stdio.h>

int partition(int *, int, int);

int main(){
  int A[100000];
  int n, i, x;

  scanf("%d", &n);

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

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

  for(i = 0; i < n; i++){
    if(i != x)      printf("%d", A[i]);
    else if(i == x) printf("[%d]", A[i]);

    if(i < n - 1) printf(" ");
    else printf("\n");
  }

  return 0;
}


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

  x = A[r];
  i = p - 1;

  for(j = p; j < r; j++){
    if(A[j] <= x){
      i++;
      
      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;
  
}

