package main import ( "fmt" "bufio" "os" "strconv" ) //•*¨*•.¸¸♪I/O•*¨*•.¸¸♪ var ( sc = bufio.NewScanner(os.Stdin) wr = bufio.NewWriter(os.Stdout) ) func scanInt() int { sc.Scan() a,_ := strconv.Atoi(sc.Text()) return a } func scanInt64() int64 { sc.Scan() a,_ := strconv.ParseInt(sc.Text(),10,64) return a } func scanFloat64() float64 { sc.Scan() a,_ := strconv.Atoi(sc.Text()) return float64(a) } func scanInts(n int) []int { res := make([]int, n) for i := 0; i < n; i++ { res[i] = scanInt() } return res } func scanText() string { sc.Scan() return sc.Text() } func printInts(a ...int) { for i, e := range a { fmt.Fprint(wr, e) if i != len(a)-1 { fmt.Fprint(wr, " ") } } fmt.Fprintln(wr) wr.Flush() } //•*¨*•.¸¸♪Main•*¨*•.¸¸♪( -ω-)ノ ( ・ω・) func main() { sc.Split(bufio.ScanWords) // sc.Buffer(make([]byte, 10000), 100000000) n := scanInt() s := make([][]int, n) for i := 0; i < n-1; i++ { u,v := scanInt(),scanInt() s[u] = append(s[u],v) s[v] = append(s[v],u) } done := make([]bool, n) c := 0 for i := 0; i < n; i++ { if done[i] { continue } queue := make([]int, 0) queue = append(queue,i) done[i] = true c++ for len(queue) != 0 { next := queue[0] for _, e := range s[next] { if done[e] { continue } done[e] = true queue = append(queue, e) } queue = queue[1:] } } if c == 1 { fmt.Println("Bob") } else { fmt.Println("Alice") } }