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ids = [9, 8, 1, 2, 7, 3]
results = Model.objects.filter(id__in=ids).extra(
select={'manual': 'FIELD(id,%s)' % ','.join(map(str, ids))},
class Node(object):
def __init__(self, val, left=None, right=None):
self.val = val
self.left = left
self.right = right
def max_of_tree(root):
if not root:
return 0
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