Lukas and ATM

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Lukas has L dollars in his bank account. He has decided to go an ATM and withdraw all L dollars from his account as he wants to buy a gift for his girlfriend. The ATM machine gives Lukas a list of n denominations in which he can withdraw money. Lukas has decided to withdraw atleast 1 currency note of each of the n denominations. Lukas is not sure about the exact price of the gift which he will bu

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