Leetcode Weekly contest 348 - Hard - Count of Integers

In this video we discuss the fourth problem of Leetcode Weekly contest 348

[mudrad]

Sir either you work really hard to improve your teaching skills or you are extremely talented in teaching.

I think no one can teach this question so flawlessly

[RishabhJain-elhh]

As always, aap aisa smjahte hain ki school days mein maths smjha krte the hum, thanks lot .and mathematical approach always helps

[nehathakur]

Nice explanation! Could not get it in first go but now after watching multiple times got it!

[learnerforlife]

Thanks for the solution !! helpuful as always <3

[venkateshv]

why is 30 chosen as no of rows(i.e; first dimension) for the dp array, when the largest integer as per the constraints ia 10^22

[levieren]

can anyone explain what does tight mean here

[HarshitMaurya]

Thank you so much, brother! I was struggling with the approach, but you made it a cakewalk for me.

Also, please explain if possible why adding 'mod' and dividing when returning is important, and why without it the answer is negative in most of the test cases.

[Om]

It is not a hate comment
But meko smjh nhi aya can you please explain that concept digit dp?

[soumyajitmishra]

no one dares to give the recursive approach