-
Notifications
You must be signed in to change notification settings - Fork 1
/
Copy path1455-CheckIfAWordOccursAsAPrefixOfAnyWordInASentence.cs
52 lines (48 loc) · 1.5 KB
/
1455-CheckIfAWordOccursAsAPrefixOfAnyWordInASentence.cs
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
//-----------------------------------------------------------------------------
// Runtime: 64ms
// Memory Usage: 21.9 MB
// Link: https://leetcode.com/submissions/detail/344137060/
//-----------------------------------------------------------------------------
namespace LeetCode
{
public class _1455_CheckIfAWordOccursAsAPrefixOfAnyWordInASentence
{
public int IsPrefixOfWord(string sentence, string searchWord)
{
var search = new Trie();
var curr = search;
foreach (var ch in searchWord)
{
curr.Next[ch - 'a'] = new Trie();
curr = curr.Next[ch - 'a'];
}
curr.Finish = true;
curr = search;
var index = 1;
for (var i = 0; i < sentence.Length; i++)
{
var ch = sentence[i];
if (ch == ' ')
{
curr = search;
index++;
continue;
}
if (curr.Next[ch - 'a'] == null)
{
while (i + 1 < sentence.Length && sentence[i + 1] != ' ')
i++;
continue;
}
curr = curr.Next[ch - 'a'];
if (curr.Finish) return index;
}
return -1;
}
private class Trie
{
public Trie[] Next = new Trie[26];
public bool Finish = false;
}
}
}