Practice Real Company Assessment Patterns • Latest 2025–2026 Mock Tests

Programming Exercises

Find the element that appears only once in an array where every other element appears twice.

Medium

Problem Statement

Find the element that appears only once in an array where every other element appears twice.

Sample Input

[1, 2, 2, 3, 3]

Sample Output

1

Limits

Time: 2s · Memory: 256 MB

Code Editor
00:00
import java.util.*; public class Main { public static int singleElement() { int[] arr = {1, 2, 2, 3, 3}; // Your code here return 0; } }
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Input
[1, 2, 2, 3, 3]
Expected Output
1