05. Square Frame

package main

import "fmt"

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

    for i := 0; i < n; i++ {
        angleChar := "|"
        if i == 0 || i == n - 1 {
            angleChar = "+"
        }
        fmt.Print(angleChar)
        for j := 0; j < n - 2; j++ {
            fmt.Print(" -")
        }
        fmt.Println(" " + angleChar)
    }
}