63: powerful digit counts

63_powerful_digit_counts/main.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"fmt"
+	"math"
+)
+
+func main() {
+	c := 0.
+	for n := 1.; n <= 9.; n++ {
+		c += math.Floor(math.Ln10 / math.Log(10/n))
+	}
+	fmt.Println("solution=", c)
+}
+
+func nPower(n, num int) int64 {
+	p := int64(1)
+	for i := 0; i < n; i++ {
+		p *= int64(num)
+	}
+	return p
+}