Hackerrank #6: Array Left Rotation | C++ | Solution | Meandering array

[@MerryEveryday]

This is a very good channel. Great explanation! I watched the video half, understood the logic I need to apply and implemented the code by myself. All test cases passed. Thanks!

[@avnimahajan4417]

vector rotLeft(vector a, int d) { for (int i=0;i

[@krishanudutta2943]

Thanks sir for helping us out

[@KnowledgeCenter]

It's my pleasure

[@sindhusiva4580]

sir, how you started problem solving and how??

[@sajalsuhane8644]

what will happen if value of d is greater than the size of vector?

[@techlyric]

but it starts from a.begin and till d-1 as per your explanation, then why in code it is till d only?

[@techlyric]

as in a.begin() +d, it should be rather (d-1)?

[@krishanudutta2943]

Sir can't we do it in normal way without using vector? pls help me sir...

[@sohamkatkar4535]

I didn't understand why we iterated the second for loop till a.begin()+d. In the ex. we want to consider only the first two elements then why the loop is iterated from 0 to 2? Can someone explain.

[@dipakkumarpanigrahi9264]

Sir I tried this but it's showing segmentation fault in test cases 5 to 9

[@KnowledgeCenter]

Can you share your code?

[@dipakkumarpanigrahi9264]

Sir please tell me the solution

[@rishabhgoel9861]

Why are we using "auto it" instead of "int it" inside the for loop ?

[@programmingwithsikander3539]

auto is a c++11 construct where it determines the type of variable based on type of initializer. for further details refer kzbin.info/www/bejne/ZnqQl4l9oKx5iZI

[@subhamjyoti1129]

since we are using it for vector , it should be written like this (vector::iterator it; ;) , it lengthy to right , so we use auto .