diff --git a/1-converter/main.go b/1-converter/main.go
index 06a255c..fea6f0e 100644
--- a/1-converter/main.go
+++ b/1-converter/main.go
@@ -5,10 +5,15 @@ import (
 	"strings"
 )
 
-const USD_TO_RUB float64 = 83.74
-const USD_TO_EUR float64 = 1.137
+type currencyMap = map[string]float64
 
 func main() {
+	var currencyMap = currencyMap{
+		"USD": 82.17,
+		"EUR": 93.45,
+		"RUB": 1.0,
+	}
+
 	for {
 		currencies := "USD EUR RUB"
 		currentCurrency := ""
@@ -39,7 +44,7 @@ func main() {
 			break
 		}
 
-		result := convert(value, currentCurrency, targetCurrency)
+		result := convert(value, currentCurrency, targetCurrency, currencyMap)
 		fmt.Printf("%.2f %s = %.2f %s\n\n", value, currentCurrency, result, targetCurrency)
 		return
 	}
@@ -57,27 +62,7 @@ func scanValue(message string) (value float64) {
 	return value
 }
 
-func convert(value float64, from string, to string) float64 {
-	var usdValue float64
-	switch from {
-	case "USD":
-		usdValue = value
-	case "RUB":
-		usdValue = value / USD_TO_RUB
-	case "EUR":
-		usdValue = value / USD_TO_EUR
-	default:
-		return 0
-	}
-
-	switch to {
-	case "USD":
-		return usdValue
-	case "RUB":
-		return usdValue * USD_TO_RUB
-	case "EUR":
-		return usdValue * USD_TO_EUR
-	default:
-		return 0
-	}
+func convert(value float64, from string, to string, currencies currencyMap) float64 {
+	rubles := value * currencies[from]
+	return rubles / currencies[to]
 }
diff --git a/2-calc/go.mod b/2-calc/go.mod
new file mode 100644
index 0000000..bbe1e61
--- /dev/null
+++ b/2-calc/go.mod
@@ -0,0 +1,3 @@
+module calc
+
+go 1.23.0
diff --git a/2-calc/main.go b/2-calc/main.go
new file mode 100644
index 0000000..c8d29c5
--- /dev/null
+++ b/2-calc/main.go
@@ -0,0 +1,91 @@
+package main
+
+import (
+	"fmt"
+	"slices"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	operations := []string{"AVG", "SUM", "MED"}
+	for {
+		operation := scanInput("Введите операцию (AVG - среднее, SUM - сумма, MED - медиана): ")
+		if !slices.Contains(operations, operation) {
+			fmt.Println("Неверная операция, попробуйте снова")
+			continue
+		}
+
+		numbers := scanNumbers("Введите числа через запятую: ")
+		if len(numbers) == 0 {
+			fmt.Println("Ни одно число не было введено")
+			continue
+		}
+
+		result := calc(operation, numbers)
+		fmt.Printf("Результат: %v\n\n", result)
+	}
+}
+
+func scanInput(message string) string {
+	fmt.Println(message)
+	var input string
+	fmt.Scanln(&input)
+	return input
+}
+
+func scanNumbers(message string) []int {
+	fmt.Println(message)
+	var input string
+	fmt.Scanln(&input)
+
+	parts := strings.Split(input, ",")
+	var numbers []int
+	for _, p := range parts {
+		num, err := strconv.Atoi(strings.TrimSpace(p))
+		if err != nil {
+			fmt.Printf("Некорректное значение: %q\n", p)
+			continue
+		}
+		numbers = append(numbers, num)
+	}
+	return numbers
+}
+
+func calc(operation string, numbers []int) int {
+	switch operation {
+	case "AVG":
+		return calcAvg(numbers)
+	case "SUM":
+		return calcSum(numbers)
+	case "MED":
+		return calcMed(numbers)
+	default:
+		return 0
+	}
+}
+
+func calcAvg(numbers []int) int {
+	sum := 0
+	for _, n := range numbers {
+		sum += n
+	}
+	return sum / len(numbers)
+}
+
+func calcSum(numbers []int) int {
+	sum := 0
+	for _, n := range numbers {
+		sum += n
+	}
+	return sum
+}
+
+func calcMed(numbers []int) int {
+	slices.Sort(numbers)
+	mid := len(numbers) / 2
+	if len(numbers)%2 == 0 {
+		return (numbers[mid-1] + numbers[mid]) / 2
+	}
+	return numbers[mid]
+}