LeetCode Coding Challenge - Add Two Numbers (2019)

LeetCode coding problem. This question is commonly asked by Amazon and Google according to LeetCode.

#keeponcoding #tech #programming

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[mikeyknight]

Wow. You're the first person who actually gave their own answer, instead of just copying the solution provided by leetcode, and acting as if it was theirs. Bravo

[shyammuppidi]

I liked the fact that you explained it exactly how a interview should be. just perfect.

[psthakur]

The first channel which clearly explained each and every step .Thanks a lot sir. Keep helping us.

[Ramentop]

Great explanation! It helped me understand the problem better than reading the provided Leetcode solution

[brxnni]

from the title i felt very smart and thought: its just return a + b;

[JoseGutierrez-gdfp]

I'm having trouble understanding what you're trying to say at 13:55 . At what point does resultHead ever get updated to point to something other than 0? Does updating resultIterator somehow update resultHead?

[nopenah]

Quick question, what stands in my way of converting given linked lists let's say to strings then ints then adding and refilling the linked list, during interviews?

[rajeevsingh]

Good explanation and a clever solution bro.. Keep it up..

[remonibrahim]

Thanks bro great explanation, but I have one comment time complexity should be O(max(m, n)), because you loop in both lists in same time

[GuitarreroDaniel]

I didn't even understand what the fucking problem was until I saw your explanation, thank you very much :)

[kevinrodriguez]

what is the "if(carry){ sum++}" doing? he says check from the previous value if there is a carry, what is the previous value? like 6 + 4 for the second resultHead node?

[MW]

Isn't the time complexity just O(n), where n is the number nodes in the longer list? Like O(n + m) doesn't necessarily make sense, since the runtime is bound by the longer list.

[MohammedBakheet]

Thank you so much, keep it up, you are great

[enjoipanda]

Correct me if wrong but wont the program not work with lists that have mismatched lengths due to the fact that the if statements for (p1 == null) and (p2==null) are inside a while loop that checks to make sure (p1 != null || p2 != null). This means the code will never be executed. Regardless, this video was very helpful and informative.

[felixliu]

Dummy_head means null to a head node, I just learnt why they call it a dummy head

[yuvrajbansal]

Best Explanation of Add 2 Numbers on Youtube :)
Upload More videos - > HARD LEVEL

[laughoutmeow]

so I'm guessing that two number added together cannot be 20 or over for this particular code?

[Sportsman]

mine says ListNode is not defined and i got a warning: comparison between null and non-pointers p1 and p2

[prajjwalmishra]

bro for me its showing null pointer exception

[wxq]

I think O(n+m) = O(n). But nice video!