Package g0801_0900.s0811_subdomain_visit_count

Class Solution

java.lang.Object
g0801_0900.s0811_subdomain_visit_count.Solution
public class Solution extends java.lang.Object
811 - Subdomain Visit Count.

Medium

A website domain "discuss.leetcode.com" consists of various subdomains. At the top level, we have "com", at the next level, we have "leetcode.com" and at the lowest level, "discuss.leetcode.com". When we visit a domain like "discuss.leetcode.com", we will also visit the parent domains "leetcode.com" and "com" implicitly.

A count-paired domain is a domain that has one of the two formats "rep d1.d2.d3" or "rep d1.d2" where rep is the number of visits to the domain and d1.d2.d3 is the domain itself.

  • For example, "9001 discuss.leetcode.com" is a count-paired domain that indicates that discuss.leetcode.com was visited 9001 times.

Given an array of count-paired domains cpdomains, return an array of the count-paired domains of each subdomain in the input. You may return the answer in any order.

Example 1:

Input: cpdomains = [“9001 discuss.leetcode.com”]

Output: [“9001 leetcode.com”,“9001 discuss.leetcode.com”,“9001 com”]

Explanation: We only have one website domain: “discuss.leetcode.com”. As discussed above, the subdomain “leetcode.com” and “com” will also be visited. So they will all be visited 9001 times.

Example 2:

Input: cpdomains = [“900 google.mail.com”, “50 yahoo.com”, “1 intel.mail.com”, “5 wiki.org”]

Output: [“901 mail.com”,“50 yahoo.com”,“900 google.mail.com”,“5 wiki.org”,“5 org”,“1 intel.mail.com”,“951 com”]

Explanation: We will visit “google.mail.com” 900 times, “yahoo.com” 50 times, “intel.mail.com” once and “wiki.org” 5 times. For the subdomains, we will visit “mail.com” 900 + 1 = 901 times, “com” 900 + 50 + 1 = 951 times, and “org” 5 times.

Constraints:

  • 1 <= cpdomain.length <= 100
  • 1 <= cpdomain[i].length <= 100
  • cpdomain[i] follows either the “repi d1i.d2i.d3i” format or the “repi d1i.d2i” format.
  • repi is an integer in the range [1, 104].
  • d1i, d2i, and d3i consist of lowercase English letters.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    java.util.List<java.lang.String>
    subdomainVisits(java.lang.String[] d)
     

    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

    • subdomainVisits

      public java.util.List<java.lang.String> subdomainVisits(java.lang.String[] d)