Creating maximum value 1 (with.Java)

This is an article about the “Creating the maximum value 1” problem.

As I solve coding test problems, I look back on the problems I solved and look into different solution methods to learn more.

Let’s look at the problem first.

problem

The integer array numbers is given as a parameter.

Complete the solution function to return the maximum value that can be created by multiplying two of the elements of numbers.

Restrictions

• 0 ≤ elements of numbers ≤ 10,000
• 2 ≤ length of numbers ≤ 100

Input/Output Example

My solution to the problem

import java.util.*;

class Solution {
     public int solution(int[] numbers) {
         int answer = 1;
         Arrays.sort(numbers);
         int endIdx = numbers.length - 1;
         for(int i = endIdx; i >= endIdx - 1; i--){
             answer *= numbers[i];
         }
         return answer;
     }
}

Solution explanation

• Arrays.sort(numbers): Sorts an array.
• endIdx: Calculates the last index of the array.
• Use the for statement to select the two largest numbers and multiply them.

Code Advantages

• Use sorting: Sorting allows you to quickly select the largest number.