Regarding lower_bound comparator

#1

Even after writing the comparator why are subtracting a 1. It should have been lower_bound(…)-coins only.

#2

hello @smallfry,

The answer to your question is given in the video itself at 4:25.
i.e.,
The lower_bound() function returns the iterator(position) to the value that is just above the required answer.
Thus, doing -1 will give us the correct position.

Hope, this would help.
Give a like if you are satisfied.

#3

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