-
Notifications
You must be signed in to change notification settings - Fork 17
/
word-break.py
67 lines (53 loc) · 1.91 KB
/
word-break.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
import unittest
from typing import List
class Solution:
def wordBreak(self, s: str, wordDict: List[str]) -> bool:
dp = [True] + [False] * len(s)
for pos in range(len(s)):
for word in wordDict:
if (
pos >= len(word) - 1
and dp[pos - len(word) + 1]
and s[pos - len(word) + 1 : pos + 1] == word
):
dp[pos + 1] = True
return dp[len(s)]
class TestSolution(unittest.TestCase):
def setUp(self):
self.sol = Solution()
def test_one1(self):
self.assertEqual(self.sol.wordBreak("a", ["a", "b"]), True)
def test_one2(self):
self.assertEqual(self.sol.wordBreak("a", ["c", "b"]), False)
def test_custom1(self):
self.assertEqual(self.sol.wordBreak("leetcode", ["leet", "code"]), True)
def test_custom2(self):
self.assertEqual(self.sol.wordBreak("applepenapple", ["apple", "pen"]), True)
def test_custom3(self):
self.assertEqual(
self.sol.wordBreak("catsandog", ["cats", "dog", "sand", "and", "cat"]),
False,
)
def test_custom4(self):
self.assertEqual(
self.sol.wordBreak(
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
[
"a",
"aa",
"aaa",
"aaaa",
"aaaaa",
"aaaaaa",
"aaaaaaa",
"aaaaaaaa",
"aaaaaaaaa",
"aaaaaaaaaa",
],
),
False,
)
def test_custom5(self):
self.assertEqual(self.sol.wordBreak("aaaaaaa", ["aaaa", "aaa"]), True)
if __name__ == "__main__":
unittest.main()