算法训练 瓷砖铺放

 1 import java.math.BigInteger;
 2 import java.util.Arrays;
 3 import java.util.Scanner;
 4 
 5 
 6 public class Main {
 7     static int n;
 8     static int m;
 9     public static void main(String[] args) {
10         Scanner input = new Scanner(System.in);
11         n = input.nextInt();
12         f(n);
13         System.out.println(m);
14                 
15     }
16     public static void f(int n){
17         if(n>=2){
18             f(n-1);
19             f(n-2);
20         }else if(n==1){
21             f(n-1);
22         }else{
23             m++;
24         }
25 
26     }
27 }