10. Diamond

package main

import (
    "fmt"
    "strings"
)

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

   var inDashes, outDashes, border string

    for i := 0; i < n / 2 + (n % 2); i++ {
        outDashes = strings.Repeat("-", (n - 1) / 2 - i)
        border = "*"

        if i == 0 {
            if n % 2 == 0 {
                border = "**"
            }
            fmt.Println(outDashes + border + outDashes)
        } else {
            inDashes = strings.Repeat("-", i * 2)
            if n % 2 == 1 {
                inDashes = strings.Repeat("-", i * 2 - 1)
            }
            fmt.Println(outDashes + border + inDashes + border + outDashes)
        }
    }

    for i := n / 2 - (1 + (n - 1) % 2); i >= 0; i-- {
        outDashes = strings.Repeat("-", (n - 1) / 2 - i)
        border = "*"

        if i == 0 {
            if n % 2 == 0 {
                border = "**"
            }
            fmt.Println(outDashes + border + outDashes)
        } else {
            inDashes = strings.Repeat("-", i * 2)
            if (n % 2 == 1) {
                inDashes = strings.Repeat("-", i * 2 - 1)
            }
            fmt.Println(outDashes + border + inDashes + border + outDashes)
        }
    }
}