题目1205：N阶楼梯上楼问题

 1 import java.util.Scanner;
 2 
 3 
 4 public class Main{
 5     public static void main(String[]args){
 6     long[]F=new long[90];
 7     F[1]=1;
 8     F[2]=2;
 9     for(int i=3;i<90;i++){
10         F[i]=F[i-1]+F[i-2];
11     }
12     Scanner in=new Scanner(System.in);
13     while(in.hasNext()){
14         int x=in.nextInt();
15         System.out.println(F[x]);
16     }
17     }
18  }