693. Binary Number with Alternating Bits
Description
Given a positive integer, check whether it has alternating bits: namely, if two adjacent bits will always have different values.
Example 1:
Input: n = 5 Output: true Explanation: The binary representation of 5 is: 101
Example 2:
Input: n = 7 Output: false Explanation: The binary representation of 7 is: 111.
Example 3:
Input: n = 11 Output: false Explanation: The binary representation of 11 is: 1011.
Constraints:
1 <= n <= 231 - 1
Solutions
Solution 1
1 2 3 4 5 6 7 8 9 10 |
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 |
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1 2 3 4 5 6 7 8 9 10 11 12 13 |
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1 2 3 4 5 6 7 8 9 10 11 12 |
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
|
Solution 2
1 2 3 4 |
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1 2 3 4 5 6 |
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1 2 3 4 5 6 7 |
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1 2 3 4 |
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1 2 3 4 |