#include<stdio.h>
#define N 100000
int partition(int *, int , int );
int main(){
  int i,j,n,A[N];
  scanf("%d", &n);
  for(i = 0; i < n; i++){
    scanf("%d", &A[n]);
  }

    j = partion(A ,0,n-1);
    for(i = 0;i<j; i++){
      printf("%d",A[i]);
      printf(" ");
    }
    printf("[%d] ", A[j]);
    for(i = j+1; i < n; i++){
      printf("%d", A[i]);
      if(i < n-1)printf(" ");
    }
  return 0;
}

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