Code / concept is very clear. However, it does not make sense why you have sum > 0 in your while loop at first, all the way until you introduce sum = carry.
sum > 0
sum = carry
You know what,sum=carry is not here because this answer has been copied from LeetCode just 1 variable changed which is currentNode.
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Code / concept is very clear.
However, it does not make sense why you have
sum > 0in your while loop at first, all the way until you introducesum = carry.You know what,sum=carry is not here because this answer has been copied from LeetCode just 1 variable changed which is currentNode.