[LeetCode] Plus One

Total Accepted: 9100 Total Submissions: 29949

Given a non-negative number represented as an array of digits, plus one to the number.

The digits are stored such that the most significant digit is at the head of the list.

public class Solution {
public int[] plusOne(int[] digits) {
int carry = 1;

for (int i = digits.length-1; i >= 0; i--) {
int temp = digits[i]+carry;
digits[i] = temp%10;
if (temp > 9 )  carry = 1;
else            carry = 0;
}

if (carry == 0) return digits;

// 100000000...
int[] tmp = new int[digits.length+1];
tmp[0] = 1;

return tmp;
}
}