paizaの練習問題を解く 出口のない迷路 Go編

package main
import "fmt"
type Location struct {
    Str string
    First int
    Second int
}
func main(){
    var n, k, s int
    fmt.Scan(&n, &k, &s)
    var locs []Location
    for i := 0; i < n; i++ {
        var fst, scd int
        var str string
        fmt.Scan(&str, &fst, &scd)
        locs = append(locs, Location {
            Str: str,
            First: fst,
            Second: scd,
        })
    }
    r := locs[s - 1].Str
    for i := 0; i < k; i++ {
        var m int
        fmt.Scan(&m)
        if m == 1 {
            s = locs[s - 1].First
        } else {
            s = locs[s - 1].Second
        }
        r += locs[s - 1].Str
    }
    fmt.Println(r)
}