Use the following code snippet to determine the new values for the array:
//Main
int[] temp = {3, 2, 5, 1, 7, 8, 9, 3, 8, 10, 14, 5};
temp = mystery(temp);
//Outside main
public static int[] mystery(int[] arr) {
for (int i = 0; i < arr.length; i++) {
if (i % 3 == 0) {
arr[i] = arr[i] + i;
if (arr[i] % 2 == 1) {
arr[i]++;
} else {
arr[i]--;
}
if (i > arr.length / 2) {
arr[i] = i * 2;
}
}
}
return arr;
}