#include<stdio.h>
#define MAX 100000

int partition(int,int);
int n;
int A[MAX];
int main( ){
  int i,j,k;

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

  k = partition(0,n-1);

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

  return 0;
}

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

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

  y = A[i+1];
  A[i+1] = A[r];
  A[r] = y;
  return i+1;
}
  

