def quartiles(n,arr):
    arr=sorted(arr)
    if n%2==1:
        q2=arr[n//2]
        q1=statistics.median(arr[:n//2])
        q3=statistics.median(arr[n//2+1:])
    else:
        q2=(arr[n//2]+arr[n//2-1])/2
        q1=statistics.median(arr[:n//2])
        q3=statistics.median(arr[n//2:])
    return [int(q1),int(q2),int(q3)]

def find_median(arr):
    n = len(arr)
    if n % 2 == 1:
        return arr[n // 2]
    else:
        return (arr[n // 2] + arr[n // 2 - 1]) / 2

def quartiles(n, arr):
    arr = sorted(arr)
    q2 = find_median(arr)
    if n % 2 == 1:
        lower_half = arr[:n // 2]
        upper_half = arr[n // 2 + 1:]
    else:
        lower_half = arr[:n // 2]
        upper_half = arr[n // 2:]
    q1 = find_median(lower_half)
    q3 = find_median(upper_half)
    return [int(q1), int(q2), int(q3)]