Check If a String Contains All Binary Codes of Size K - Video Solutions

MediumHash TableStringBit ManipulationRolling HashHash Function

Check if a String Contains all Binary Codes of Size K - Leetcode 1461 - Python

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Check If a String Contains All Binary Codes of Size K - Video Solution

Watch 10 video solutions for Check If a String Contains All Binary Codes of Size K, a medium level problem involving Hash Table, String, Bit Manipulation. This walkthrough by NeetCode has 18,295 views views. Want to try solving it yourself? Practice on FleetCode or read the detailed text solution.

Problem Statement

Given a binary string s and an integer k, return true if every binary code of length k is a substring of s. Otherwise, return false.

Example 1:

Input: s = "00110110", k = 2
Output: true
Explanation: The binary codes of length 2 are "00", "01", "10" and "11". They can be all found as substrings at indices 0, 1, 3 and 2 respectively.

Example 2:

Input: s = "0110", k = 1
Output: true
Explanation: The binary codes of length 1 are "0" and "1", it is clear that both exist as a substring.

Example 3:

Input: s = "0110", k = 2
Output: false
Explanation: The binary code "00" is of length 2 and does not exist in the array.

Constraints:

1 <= s.length <= 5 * 10⁵
s[i] is either '0' or '1'.
1 <= k <= 20

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