Пример #1
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    def test_count_sorted(self):
        items = [1, 2, 3, 4, 5]

        # merge sort only
        inv = Inversions(items, 0)
        self.assertEqual(inv.count(), 0)

        # insertion sort only
        inv = Inversions(items)
        self.assertEqual(inv.count(), 0)

        # mixed
        inv = Inversions(items, 2)
        self.assertEqual(inv.count(), 0)
Пример #2
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    def test_count_reversed(self):
        items = [5, 4, 3, 2, 1]

        # merge sort only
        inv = Inversions(items, 0)
        self.assertEqual(inv.count(), 10)

        # insertion sort only
        inv = Inversions(items)
        self.assertEqual(inv.count(), 10)

        # mixed
        inv = Inversions(items, 2)
        self.assertEqual(inv.count(), 10)
Пример #3
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    def test_count_split_inversions(self):
        items = [1, 4, 6, 5, 2]
        # (4,2) (6,5) (6,2) (5,2)

        # merge sort only
        inv = Inversions(items, 0)
        self.assertEqual(inv.count(), 4)

        # insertion sort only
        inv = Inversions(items)
        self.assertEqual(inv.count(), 4)

        # mixed
        inv = Inversions(items, 2)
        self.assertEqual(inv.count(), 4)
Пример #4
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    def test_count_side_inversions(self):
        items = [1, 2, 4, 3]
        # (4,3)

        # merge sort only
        inv = Inversions(items, 0)
        self.assertEqual(inv.count(), 1)

        # insertion sort only
        inv = Inversions(items)
        self.assertEqual(inv.count(), 1)

        # mixed
        inv = Inversions(items, 2)
        self.assertEqual(inv.count(), 1)
Пример #5
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#!/usr/bin/env python3

import argparse
import random
import sys
from inversions import Inversions

parser = argparse.ArgumentParser(description='Inversions client.')
group = parser.add_mutually_exclusive_group()
group.add_argument('-b', '--bound', type=int, help='Upper bound number')
group.add_argument('infile', nargs='?', type=argparse.FileType('r'),
                   default=sys.stdin,
                   help='Input file with numbers (default stdin)')

args = parser.parse_args()
if args.bound is not None:
    nums = list(range(1, args.bound+1))
    random.shuffle(nums)
else:
    nums = [int(num) for num in args.infile]

inv = Inversions(nums)
print(inv.count())