mirror of
https://github.com/cubixle/codekata-golang.git
synced 2026-04-24 21:24:46 +01:00
37 lines
517 B
Go
37 lines
517 B
Go
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"math"
|
|
"strconv"
|
|
)
|
|
|
|
func main() {
|
|
p := 1
|
|
for i := 0; i < 7; i++ {
|
|
n := int(math.Pow(10, float64(i)))
|
|
fmt.Println(n)
|
|
p *= getDigit(n)
|
|
}
|
|
fmt.Println("num=", p)
|
|
}
|
|
|
|
func getDigit(n int) int {
|
|
var r, s, k int
|
|
for s < n {
|
|
r = s
|
|
k++
|
|
s += k * 9 * int(math.Pow(10, float64(k-1)))
|
|
}
|
|
h := n - r - 1
|
|
t := int(math.Pow(10, float64(k-1))) + h/k
|
|
p := h % k
|
|
for i, s := range strconv.Itoa(t) {
|
|
if i == p {
|
|
ret, _ := strconv.Atoi(string(s))
|
|
return ret
|
|
}
|
|
}
|
|
return 0
|
|
}
|