Skip to content

1016. Binary String With Substrings Representing 1 To N

Difficulty Topics

Description

Given a binary string s and a positive integer n, return true if the binary representation of all the integers in the range [1, n] are substrings of s, or false otherwise.

A substring is a contiguous sequence of characters within a string.

 

Example 1:

Input: s = "0110", n = 3
Output: true

Example 2:

Input: s = "0110", n = 4
Output: false

 

Constraints:

  • 1 <= s.length <= 1000
  • s[i] is either '0' or '1'.
  • 1 <= n <= 109

Solution

binary-string-with-substrings-representing-1-to-n.py
class Solution:
    def queryString(self, s: str, n: int) -> bool:

        for i in range(n // 2 + 1, n + 1):
            b = bin(i)[2:]
            if b not in s: return False

        return True