60. KMP String Matching

Hard

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Example 1:

Input: text = "ABABDABACDABABCABAB", pattern = "ABABCABAB"

Output: [10]

Explanation: The pattern "ABABCABAB" occurs once in the text, starting at index 10.

Example 2:

Input: text = "AAAAA", pattern = "AAA"

Output: [0, 1, 2]

Explanation: The pattern "AAA" occurs three times in the text, starting at indices 0, 1, and 2.

Example 3:

Input: text = "ABCABCD", pattern = "ABCD"

Output: [3]

Explanation: The pattern "ABCD" occurs once in the text, starting at index 3.

Example 4:

Input: text = "GEEKS FOR GEEKS", pattern = "GEEK"

Output: [0, 10]

Explanation: The pattern "GEEK" occurs twice, once at the beginning and again with a space in between

Example 5:

Input: text = "THIS IS A TEST TEXT", pattern = "TEST"

Output: [10]

Explanation: The pattern "TEST" is found once starting at index 10

Constraints:

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Time Complexity

O(n+m)

Space Complexity

O(m)