66. Plus one
Published in
1 min readJul 19, 2023
Easy
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.
Example 1:
Input: digits = [1,2,3]
Output: [1,2,4]
Explanation: The array represents the integer 123.
Incrementing by one gives 123 + 1 = 124.
Thus, the result should be [1,2,4].
Example 2:
Input: digits = [4,3,2,1]
Output: [4,3,2,2]
Explanation: The array represents the integer 4321.
Incrementing by one gives 4321 + 1 = 4322.
Thus, the result should be [4,3,2,2].
Example 3:
Input: digits = [9]
Output: [1,0]
Explanation: The array represents the integer 9.
Incrementing by one gives 9 + 1 = 10.
Thus, the result should be [1,0].
Constraints:
1 <= digits.length <= 100
0 <= digits[i] <= 9
digits
does not contain any leading0
's.
Solution:
class Solution {
public int[] plusOne(int[] digits) {
int n = digits.length;
for(int i=n-1;i>=0;i--)
{
if(digits[i] < 9)
{
digits[i]++;
return digits;
}
digits[i] = 0;
}
int nums[] = new int[n+1];
nums[0] = 1;
return nums;
}
}