public class Solution {
    public int JumpFloor(int target) {
        if(target==0)
        {
            return 0;
        }
        if(target==1)
        {
            return 1;
        }
        if(target==2)
        {
            return 2;
        }
        return JumpFloor(target - 1)+JumpFloor(target - 2);
    }
}