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Plus One
Easy Accuracy: 53.21% Submissions: 6148 Points: 2

Given a non-negative number represented as a list of digits, add 1 to the number (increment the number represented by the digits). The digits are stored such that the most significant digit is first element of array.

Example 1:

Input:
N = 3
arr[] = {1, 2, 4}
Output:
1 2 5
Explanation:
124+1 = 125, and so the Output

Example 2:

Input:
N = 3
arr[] = {9,9,9}
Output:
1 0 0 0
Explanation:
999+1 = 1000, and so the output

You don't need to read input or print anything. You only need to complete the function increment() that takes an integer N, and an array arr of size N as input and returns a list of integers denoting the new number which we get after adding one to the number denoted by the array arr.

Expected Time Complexity:  O(N)
Expected Auxilliary Space: O(1)

Constraints:
1 <= N <= 105
0 <= arri <= 9