Add solution for Challenge 22 by Johrespi

challenge-22/submissions/Johrespi/solution-template.go

@@ -0,0 +1,79 @@
+package main
+
+import (
+	"fmt"
+)
+
+func main() {
+	// Standard U.S. coin denominations in cents
+	denominations := []int{1, 5, 10, 25, 50}
+
+	// Test amounts
+	amounts := []int{87, 42, 99, 33, 7}
+
+	for _, amount := range amounts {
+		// Find minimum number of coins
+		minCoins := MinCoins(amount, denominations)
+
+		// Find coin combination
+		coinCombo := CoinCombination(amount, denominations)
+
+		// Print results
+		fmt.Printf("Amount: %d cents\n", amount)
+		fmt.Printf("Minimum coins needed: %d\n", minCoins)
+		fmt.Printf("Coin combination: %v\n", coinCombo)
+		fmt.Println("---------------------------")
+	}
+}
+
+// MinCoins returns the minimum number of coins needed to make the given amount.
+// If the amount cannot be made with the given denominations, return -1.
+func MinCoins(amount int, denominations []int) int {
+	// TODO: Implement this function
+	min := 0
+	sum :=0
+
+	for i := len(denominations) -1 ; i >= 0; i-- {
+	    for {
+	        if sum + denominations[i] <= amount{
+	            sum += denominations[i]
+	            min++
+	        } else{
+	            break
+	        } 
+	    }    
+	}
+
+	if sum != amount{
+	    return -1
+	}
+
+	return min
+}
+
+// CoinCombination returns a map with the specific combination of coins that gives
+// the minimum number. The keys are coin denominations and values are the number of
+// coins used for each denomination.
+// If the amount cannot be made with the given denominations, return an empty map.
+func CoinCombination(amount int, denominations []int) map[int]int {
+	// TODO: Implement this function
+	c := make(map[int]int)
+	sum := 0
+
+	for i:= len(denominations) - 1; i >= 0; i--{
+	    for{
+	        if sum + denominations[i] <= amount{
+	            sum += denominations[i]
+	            c[denominations[i]]++
+	        } else{
+	            break
+	        }
+	    }
+	}
+
+	if sum != amount {
+	    return map[int]int{}
+	}
+
+	return c
+}