#include<stdio.h>

#define N 100000
int partition(int*,int,int);

int main(void){
  int n,A[N],index;
  int i;

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

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

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

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

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

