Why a<= b in comparator?

#1

how did we come to know that lower_bounds uses which comparison within its comparator. And how can we say if we use a<=b we will get 100 for 168 and not 50 or anything less than 100, why 100 is being returned

#2

@snatchit using comparator a<=b in lowerbound makes it behave as upperbound nothing else. so of no use just use upper bound instead

#3

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