at 13:00 ,at line no 19. why are we taking prices[s.top()]<=currentprice and not prices[i]<=current price?
Doubt in lecture
Hi Dipesh.
in question we have already assigned currentprice = price[i]. so prices[i]<=current which is equivalent to currentprice <=currentprice makes no sense. also we are looking for a day in past where price was greater than the current price.
Hope ur doubt is cleared.
so for any array lets say here it is prices[],we can directly write prices[s.top()] and it will give top element of the array?
yes u can do it directly. sir has used the extra variable just for explanation purpose.
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we can directly write s.top() also right?
no. logically think. in stack we are just storing the indices and not the prices. so to get to know about the price at that particular index u have to use price[s.top()]
Hope it clears all ur doubts.
okay thanks got it…
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