What is the use of radix sort?

Radix sorting is a "distributive sorting". It allocates the elements to be sorted into certain "buckets" through part of the key value information to achieve the sorting effect. Radix sorting is suitable for Sort data such as time and string whose overall weight is unknown.

Radix sort is a "distribution sort", also known as "bucket sort" or bin sort. As the name suggests, it allocates the elements to be sorted into certain "buckets" through part of the key value information to achieve the sorting effect. The radix sorting method is a stable sorting, and its time complexity is O (nlog (r)m), where r is the base taken, and m is the number of heaps. At certain times, the radix sorting method is more efficient than other stability sorting methods.

Radix sorting is suitable for sorting data such as time and strings whose overall weight is unknown.

Implementation method

Most Significant Digit first method, referred to as MSD method: first sort and group by k1, record in the same group, key If the codes k1 are equal, then each group is sorted into subgroups according to k2. After that, the following key codes continue to be sorted and grouped in this way until each subgroup is sorted according to the lowest key code kd. Then connect the groups to get an ordered sequence.

The Least Significant Digit first method, referred to as the LSD method: start sorting from kd, then sort kd-1, and repeat in sequence until k1 is sorted and an ordered sequence is obtained.

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