查找数组中最大的三个元素

def find_top_three(arr):
    if len(arr) < 3:
        return arr
    
    first = second = third = float('-inf')
    
    for num in arr:
        if num > first:
            third = second
            second = first
            first = num
        elif num > second:
            third = second
            second = num
        elif num > third:
            third = num
    
    return [first, second, third]

# 示例数组
arr = [3, 6, 1, 8, 4, 2, 10, 5]
print(find_top_three(arr))  # 输出: [10, 8, 6]