import java.util.*;public class Solution {/*** 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可** * @param number int整型 * @return int整型*/public int jumpFloor (int number) {// write code hereif(number == 1) return 1;if(number == 2) return 2;int a = 1;int b = 2;int res = 0;for(int i = 3; i <= number; i++){//res = a + b;a = b;b = res;}return res;}
}

跟斐波那契数列很像