20201119

20201119/main.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"fmt"
+)
+
+func main() {
+	fmt.Println(multiple(9, 9))
+}
+
+func multiple(n, m uint64) uint64 {
+	if m == 1 {
+		return n
+	}
+	return n + multiple(n, m-1)
+}
+
+func multiple2(n, m uint64) uint64 {
+	sum := n
+	m--
+	if m > 0 {
+		sum += multiple2(n, m)
+	}
+	return sum
+}