LeetCode 3043: Find the Length of the Longest Common Prefix Solution
Master LeetCode problem 3043 (Find the Length of the Longest Common Prefix), a medium challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.
3043. Find the Length of the Longest Common Prefix
Problem Explanation
Explanation
To find the length of the longest common prefix between all pairs of integers from two arrays, we can iterate through each pair and compare the digits of the integers to find the common prefix. We start by converting the integers to strings to easily compare the characters. We iterate through the digits of each integer and compare them. If the digits match, we increment the count of common prefix length. If the digits don't match, we break out of the loop. We repeat this process for all pairs of integers and return the maximum common prefix length found.
- Time complexity: O(n * m) where n and m are the lengths of the input arrays.
- Space complexity: O(1) as we are not using any extra space proportional to the input size.
Solution Code
class Solution {
public int findCommonPrefix(int[] arr1, int[] arr2) {
int maxLength = 0;
for (int num1 : arr1) {
for (int num2 : arr2) {
String str1 = String.valueOf(num1);
String str2 = String.valueOf(num2);
int i = 0, j = 0;
int commonLength = 0;
while (i < str1.length() && j < str2.length() && str1.charAt(i) == str2.charAt(j)) {
commonLength++;
i++;
j++;
}
maxLength = Math.max(maxLength, commonLength);
}
}
return maxLength;
}
}Try It Yourself
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