Question: consider a greedy algorithm that selects stamps by first choosing as many of the 10-cent stamps as possible, then as many of 8 cent stamps

consider a greedy algorithm that selects stamps by first choosing as many of the 10-cent stamps as possible, then as many of 8 cent stamps as possible, then as many 1 cent stamps as possible. does this greedy algorithm always produce the fewest number of stamps needed for each possible amount of postage? why or why not

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