src/main/java/com/fishercoder/solutions/_1287.java

package com.fishercoder.solutions;

public class _1287 {
    public static class Solution1 {
        public int findSpecialInteger(int[] arr) {
            int quarter = arr.length / 4;
            for (int i = 0; i < arr.length - quarter; i++) {
                if (arr[i] == arr[i + quarter]) {
                    return arr[i];
                }
            }
            return -1;
        }
    }
}