解题思路:
注意事项:
参考代码:
import java.util.Scanner; public class Main { public static int sum = 0; public static int a; public static void main(String[] args) { Scanner sc = new Scanner(System.in); a = sc.nextInt(); f(a); System.out.println(sum); } private static void f(int x) { if (x == 0) { sum++; return; } if (x < 0) return; f(x - 1); f(x - 2); } }
0.0分
0 人评分