Package g0501_0600.s0600_non_negative_integers_without_consecutive_ones

Class Solution

java.lang.Object
g0501_0600.s0600_non_negative_integers_without_consecutive_ones.Solution
public class Solution extends java.lang.Object
600 - Non-negative Integers without Consecutive Ones.

Hard

Given a positive integer n, return the number of the integers in the range [0, n] whose binary representations do not contain consecutive ones.

Example 1:

Input: n = 5

Output: 5

Explanation:

 Here are the non-negative integers <= 5 with their corresponding binary representations:
 0 : 0
 1 : 1
 2 : 10
 3 : 11
 4 : 100
 5 : 101
 Among them, only integer 3 disobeys the rule (two consecutive ones) and the other 5 satisfy the rule.

Example 2:

Input: n = 1

Output: 2

Example 3:

Input: n = 2

Output: 3

Constraints:

  • 1 <= n <= 109

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    findIntegers(int n)
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • findIntegers

      public int findIntegers(int n)