easyArray Basics (1D)

Largest Element in an Array

Find the largest value in a nonempty integer array.

GeeksforGeeks ↗

Work through the cases

3 examples

Input notation

One line of space-separated integers.

Expected result

The largest value.

Case 1

Input

-4 8 3 1

Expected output

Case 2

Input

-9 -2 -7

Expected output

-2

Case 3

Input

Expected output

These notes use simplified input/output notation. The linked platform defines the method signature and judge format.

FROM IDEA TO IMPLEMENTATION

Understand the approach.

Compare the documented approaches below. Brute force, better, and optimal versions appear where available; a direct exercise may need only one approach.

Initialize with the first value so negative-only arrays work. Time: O(n). Extra space: O(1), excluding the input array.

import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        ArrayList<Long> values = new ArrayList<>();
        while (in.hasNextLong()) values.add(in.nextLong());
        long[] a = values.stream().mapToLong(Long::longValue).toArray();
        long n = a[0];
        long best = a[0]; for (long v : a) best = Math.max(best, v); System.out.println(best);
    }
}

Reference code. Platform solutions may use supplied node types, imports, or collection libraries; foundational examples are complete programs.