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Problem · Bit Manipulation

Swap Adjacent Nibbles

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● Easy

Arista NetworksFULLTIMEPHONE SCREEN

Problem statement

Treat a non-negative value as exactly eight hexadecimal digits, including leading zeroes. Swap each adjacent pair of four-bit nibbles: the first with the second, the third with the fourth, and so on. Return the resulting unsigned 32-bit value as a long.

Function

swapAdjacentNibbles(value: long) → long

Examples

Example 1

value = 305419896return = 558065031

The hexadecimal digits 12 34 56 78 become 21 43 65 87.

Constraints

0 <= value <= 2^32 - 1