โจทย์
For each requested pattern, decide whether it appears as a contiguous substring anywhere in the shared text. Patterns may overlap and may repeat. Return results in the original query order. The limits require an approach that can handle many patterns efficiently.
Implement find_many_patterns(text, patterns).
Input
text: The text searched by every query.
patterns: The patterns, in query order.
Output
Return YES for each occurring pattern and NO for each absent one.
เงื่อนไข
1…100,000 text characters. 1…100,000 nonempty patterns, with total length at most 500,000. All characters are lowercase a–z.
ตัวอย่าง
อินพุต:
text = "bananas"
patterns = ["ana", "apple", "nas"]
ผลลัพธ์ที่คาดหวัง:
expected = ["YES", "NO", "YES"]
อินพุต:
std::string text = "bananas";
std::vector<std::string> patterns = {"ana", "apple", "nas"};
ผลลัพธ์ที่คาดหวัง:
std::vector<std::string> expected = {"YES", "NO", "YES"};
อินพุต:
string text = "bananas";
string[] patterns = new string[] {"ana", "apple", "nas"};
ผลลัพธ์ที่คาดหวัง:
string[] expected = new string[] {"YES", "NO", "YES"};
คำอธิบาย
Ana appears starting at position 2 and nas at position 5 (positions start at 1 here). Apple never appears.
อินพุต:
text = "aaaa"
patterns = ["aa", "aaaaa", "aa"]
ผลลัพธ์ที่คาดหวัง:
expected = ["YES", "NO", "YES"]
อินพุต:
std::string text = "aaaa";
std::vector<std::string> patterns = {"aa", "aaaaa", "aa"};
ผลลัพธ์ที่คาดหวัง:
std::vector<std::string> expected = {"YES", "NO", "YES"};
อินพุต:
string text = "aaaa";
string[] patterns = new string[] {"aa", "aaaaa", "aa"};
ผลลัพธ์ที่คาดหวัง:
string[] expected = new string[] {"YES", "NO", "YES"};
คำอธิบาย
Aa occurs despite overlapping matches. Five a characters cannot fit in a four-character text. The repeated aa query receives the same answer.
แหล่งอ้างอิง
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