public class JumpFloor {

    public static int jumpFloor(int target) {
        int res[] = new int[2];
        res[0]=1;
        res[1]=2; // 与前面的题只有初始值不一样
        int temp = 0;
        if(target==0) return 0;
        if(target<=2) return res[target-1];
        for(int i=3; i<=target ; ++i){
            temp = res[0]+res[1];
            res[0] = res[1];
            res[1] = temp;
        }
        return temp;
    }

    public static void main(String[] args){

    }