题解 | #跳台阶#

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) {
        if (number == 1) {
            return 1;
        } else if (number == 2) {
            return 2;
        }
        int one = 2;
        int two = 1;
        int sum = 3;
        for (int i = 3; i <= number; i++) {
            sum = one + two;
            two = one;
            one = sum;
        }
        return sum;
    }
}