Perfect Diamond

package main

import (
  "fmt"
  "strings"
)

func main() {
    var n int
    fmt.Scanln(&n)

    for i := 0; i < n; i++ {
        fmt.Println(strings.Repeat(" ", n - (i + 1)) + "*" + strings.Repeat("-*", i))
    }

    for i := n - 2; i >= 0; i-- {
        fmt.Println(strings.Repeat(" ", n - (i + 1)) + "*" + strings.Repeat("-*", i))
    }
}