Package g3001_3100.s3043_find_the_length_of_the_longest_common_prefix

Class Solution

java.lang.Object
g3001_3100.s3043_find_the_length_of_the_longest_common_prefix.Solution
public class Solution extends java.lang.Object
3043 - Find the Length of the Longest Common Prefix.

Medium

You are given two arrays with positive integers arr1 and arr2.

A prefix of a positive integer is an integer formed by one or more of its digits, starting from its leftmost digit. For example, 123 is a prefix of the integer 12345, while 234 is not.

A common prefix of two integers a and b is an integer c, such that c is a prefix of both a and b. For example, 5655359 and 56554 have a common prefix 565 while 1223 and 43456 do not have a common prefix.

You need to find the length of the longest common prefix between all pairs of integers (x, y) such that x belongs to arr1 and y belongs to arr2.

Return the length of the longest common prefix among all pairs. If no common prefix exists among them, return 0.

Example 1:

Input: arr1 = [1,10,100], arr2 = [1000]

Output: 3

Explanation: There are 3 pairs (arr1[i], arr2[j]):

  • The longest common prefix of (1, 1000) is 1.

  • The longest common prefix of (10, 1000) is 10.

  • The longest common prefix of (100, 1000) is 100.

The longest common prefix is 100 with a length of 3.

Example 2:

Input: arr1 = [1,2,3], arr2 = [4,4,4]

Output: 0

Explanation: There exists no common prefix for any pair (arr1[i], arr2[j]), hence we return 0.

Note that common prefixes between elements of the same array do not count.

Constraints:

  • 1 <= arr1.length, arr2.length <= 5 * 104
  • 1 <= arr1[i], arr2[i] <= 108

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    longestCommonPrefix(int[] arr1, int[] arr2)
     

    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

    • longestCommonPrefix

      public int longestCommonPrefix(int[] arr1, int[] arr2)