how there is one way to stand at "0th " ladder
Doubt in ladder top down explaination
Okay lets say n=0, which means that you need to go nth step which is the current step on which you are standing.
So the only way to reach it is do nothing just be there i.e. 1.
Lets say if we have taken it as 0, what means it is number of ways to reach nth step is zero i.e. we can’t reach it which is not the case.
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