- Be careful when there are
9s. Especially when you have to add another
1in front of the array.
You are given a
large integer represented as an integer array digits, where each digits[i] is the ith digit of the integer. The digits are ordered from most significant to least significant in left-to-right order. The large integer does not contain any leading 0’s.
Increment the large integer by one and return the resulting array of digits.
Input: digits = [1,2,3]