def solution(arr):
    answer = []
    for i in range(len(arr)):
        if arr[i:i+1] == arr[i+1:i+2]:
            continue
        else:
            answer.append(arr[i])
    return answer

def solution(arr):
    answer = sum(arr) / len(arr)
    return answer

def solution(n):
    num = 0
    for i in range(1, n+1):
        if n % i == 0:
            num += i
    return num

def solution(s):
    if s.lower().count("p") == s.lower().count("y"):
        return True
    else:
        return False

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