diff --git a/exercises/change/description.md b/exercises/change/description.md deleted file mode 100644 index 6dac387fc8..0000000000 --- a/exercises/change/description.md +++ /dev/null @@ -1,14 +0,0 @@ -# Description - -Correctly determine the fewest number of coins to be given to a customer such that the sum of the coins' value would equal the correct amount of change. - -## For example - -- An input of 15 with [1, 5, 10, 25, 100] should return one nickel (5) and one dime (10) or [5, 10] -- An input of 40 with [1, 5, 10, 25, 100] should return one nickel (5) and one dime (10) and one quarter (25) or [5, 10, 25] - -## Edge cases - -- Does your algorithm work for any given set of coins? -- Can you ask for negative change? -- Can you ask for a change value smaller than the smallest coin value? diff --git a/exercises/change/instructions.md b/exercises/change/instructions.md new file mode 100644 index 0000000000..5887f4cb69 --- /dev/null +++ b/exercises/change/instructions.md @@ -0,0 +1,8 @@ +# Instructions + +Determine the fewest number of coins to give a customer so that the sum of their values equals the correct amount of change. + +## Examples + +- An amount of 15 with available coin values [1, 5, 10, 25, 100] should return one coin of value 5 and one coin of value 10, or [5, 10]. +- An amount of 40 with available coin values [1, 5, 10, 25, 100] should return one coin of value 5, one coin of value 10, and one coin of value 25, or [5, 10, 25]. diff --git a/exercises/change/introduction.md b/exercises/change/introduction.md new file mode 100644 index 0000000000..b4f8308a1b --- /dev/null +++ b/exercises/change/introduction.md @@ -0,0 +1,26 @@ +# Introduction + +In the mystical village of Coinholt, you stand behind the counter of your bakery, arranging a fresh batch of pastries. +The door creaks open, and in walks Denara, a skilled merchant with a keen eye for quality goods. +After a quick meal, she slides a shimmering coin across the counter, representing a value of 100 units. + +You smile, taking the coin, and glance at the total cost of the meal: 88 units. +That means you need to return 12 units in change. + +Denara holds out her hand expectantly. +"Just give me the fewest coins," she says with a smile. +"My pouch is already full, and I don't want to risk losing them on the road." + +You know you have a few options. +"We have Lumis (worth 10 units), Viras (worth 5 units), and Zenth (worth 2 units) available for change." + +You quickly calculate the possibilities in your head: + +- one Lumis (1 × 10 units) + one Zenth (1 × 2 units) = 2 coins total +- two Viras (2 × 5 units) + one Zenth (1 × 2 units) = 3 coins total +- six Zenth (6 × 2 units) = 6 coins total + +"The best choice is two coins: one Lumis and one Zenth," you say, handing her the change. + +Denara smiles, clearly impressed. +"As always, you've got it right."