Sandbox::https://github.com/prashanthigupta/leetcode-algorithms/blob/master/src/PlusOne.java

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import java.util.Arrays;

import java.util.Scanner;

import java.util.Stack;

public class PlusOne {

public static int[] plusOne(int[] digits) {

Stack<Integer> numbers = new Stack<>();

int carry = 0;

for (int index = digits.length - 1, factor = 1 ; index >= 0 ; index--) {

int value = digits[index] + factor + carry;

numbers.push(value % 10);

carry = value / 10;

factor = 0;

}

if (carry > 0) {

numbers.push(carry);

}

int[] result = new int[numbers.size()];

int index = 0;

while (!numbers.isEmpty()) {

result[index++] = numbers.pop();

}

return result;

}