1def is_shrub(element) -> bool:
 2    valid_shrub_names = frozenset(("храст", "shrub", "bush"))
 3
 4    if type(element) is not dict:
 5        return False
 6
 7    if element.get("name").lower() not in valid_shrub_names:
 8        return False
 9
10    return True
11
12
13def is_too_expensive(overall_cost) -> bool:
14
15    return overall_cost > 42
16
17
18def is_looking_nice(keywords_unique_char_count, overall_cost) -> bool:
19    overall_cost_integer_part = int(overall_cost)
20
21    if overall_cost_integer_part == 0:
22        return False
23
24    return keywords_unique_char_count % overall_cost_integer_part == 0
25
26
27def function_that_says_ni(*args, **kwargs):
28    overall_cost = 0
29    keywords_unique_char_set = set()
30
31    for argument in args:
32        if not is_shrub(argument):
33            continue
34
35        overall_cost += argument.get("cost", 0)
36
37    for keyword in kwargs:
38        value = kwargs.get(keyword)
39
40        if not is_shrub(value):
41            continue
42
43        for char in keyword:
44            keywords_unique_char_set.add(char)
45
46        overall_cost += value.get("cost", 0)
47
48    if (is_looking_nice(len(keywords_unique_char_set), overall_cost) and
49        not is_too_expensive(overall_cost)):
50
51        return f"{overall_cost:.2f}лв"
52    else:
53        return "Ni!"