Add solution for Challenge 22 by Kosench

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

@@ -0,0 +1,90 @@
+package main
+
+import (
+	"fmt"
+	"sort"
+)
+
+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("---------------------------")
+	}
+}
+
+func MinCoins(amount int, denominations []int) int {
+	if amount < 0 {
+		return -1
+	}
+	if amount == 0 {
+		return 0
+	}
+
+	sorted := append([]int(nil), denominations...)
+	sort.Ints(sorted)
+
+	totalCoins := 0
+	remaining := amount
+
+	for i := len(sorted) - 1; i >= 0; i-- {
+		coin := sorted[i]
+		if coin > 0 && coin <= remaining {
+			count := remaining / coin
+			totalCoins += count
+			remaining %= coin
+		}
+		if remaining == 0 {
+			break
+		}
+	}
+
+	if remaining > 0 {
+		return -1
+	}
+	return totalCoins
+}
+
+// CoinCombination returns a map with the specific combination of coins.
+func CoinCombination(amount int, denominations []int) map[int]int {
+	combo := make(map[int]int)
+	if amount < 0 {
+		return combo
+	}
+
+	sorted := append([]int(nil), denominations...)
+	sort.Ints(sorted)
+
+	remaining := amount
+
+	for i := len(sorted) - 1; i >= 0; i-- {
+		coin := sorted[i]
+		if coin > 0 && coin <= remaining {
+			count := remaining / coin
+			combo[coin] = count
+			remaining %= coin
+		}
+		if remaining == 0 {
+			break
+		}
+	}
+
+	if remaining > 0 {
+		return make(map[int]int)
+	}
+	return combo
+}