198
274
125
504
f(1)=1,f(2)=2,f(3)=4,....
f(n)=f(n-1)+f(n-2)+f(n-3)
public class Main { public static void main(String[] args) throws NoSuchFieldException { System.out.println(new Main().f(11)); } public int f(int x){ if(x==0) return 1; if(x==1) return 1; if(x==2) return 2; if(x==3) return 4; return f(x-1)+f(x-2)+f(x-3); } }
这道题你会答吗?花几分钟告诉大家答案吧!
扫描二维码,关注牛客网
下载牛客APP,随时随地刷题