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even_odd_array.py
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even_odd_array.py
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import collections
import functools
from test_framework import generic_test
from test_framework.test_failure import TestFailure
from test_framework.test_utils import enable_executor_hook
def even_odd(A):
next_even, next_odd = 0, len(A) - 1
while next_even < next_odd:
if A[next_even] % 2 == 0:
next_even += 1
else:
A[next_even], A[next_odd] = A[next_odd], A[next_even]
next_odd -= 1
@enable_executor_hook
def even_odd_wrapper(executor, A):
before = collections.Counter(A)
executor.run(functools.partial(even_odd, A))
in_odd = False
for a in A:
if a % 2 == 0:
if in_odd:
raise TestFailure("Even elements appear in odd part")
else:
in_odd = True
after = collections.Counter(A)
if before != after:
raise TestFailure("Elements mismatch")
if __name__ == '__main__':
exit(
generic_test.generic_test_main("even_odd_array.py",
'even_odd_array.tsv', even_odd_wrapper))