binary-string-with-substrings-representing-1-to-n.py

# -*- coding:utf-8 -*-


# Given a binary string S (a string consisting only of '0' and '1's) and a positive integer N, return true if and only if for every integer X from 1 to N, the binary representation of X is a substring of S.
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# Example 1:
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# Input: S = "0110", N = 3
# Output: true
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# Example 2:
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# Input: S = "0110", N = 4
# Output: false
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# Note:
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# 	1 <= S.length <= 1000
# 	1 <= N <= 10^9
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class Solution(object):
    def queryString(self, S, N):
        """
        :type S: str
        :type N: int
        :rtype: bool
        """
        for i in range(1,N + 1):
             target = bin(i)
             if str(target)[2:] not in S:
                     return False

        return True