课上练习：

<span style="color:rgba(0&#44;  0&#44;  0&#44;  0.87);font-family:Lato&#44;  &quot;font-size:14px;text-wrap-mode:wrap;background-color:#FFFFFF;">2219:</span><a href="http://www.ddcoj.com/problem.php?id=2219" target="_blank" style="box-sizing:inherit;color:#013093;text-decoration-line:none;background-color:#FFFFFF;font-family:Lato&#44;  &quot;font-size:14px;text-wrap-mode:wrap;">【入门】统计每个月兔子的总数&nbsp;&nbsp;递归 递推</a><br style="box-sizing:inherit;color:rgba(0&#44;  0&#44;  0&#44;  0.87);font-family:Lato&#44;  &quot;font-size:14px;text-wrap-mode:wrap;background-color:#FFFFFF;" />

2144:【入门】求S的值  函数问题
2172:【入门】求s=a+aa+aaa+aaaa+aa...a的值  函数问题 递归
2124:【入门】求1/1+1/2+2/3+3/5+5/8+8/13+13/21……的前n项的和  函数问题

课后作业：

<div id="ptitles" style="box-sizing:inherit;color:rgba(0&#44;  0&#44;  0&#44;  0.87);font-family:Lato&#44;  &quot;font-size:14px;text-wrap-mode:wrap;background-color:#FFFFFF;">
	2109:<a href="http://www.ddcoj.com/problem.php?id=2109" target="_blank" style="box-sizing:inherit;color:#013093;text-decoration-line:none;background-color:transparent;">【入门】数数小木块&nbsp;&nbsp;函数问题 递归</a><br style="box-sizing:inherit;" />

2101:【入门】数列求和  函数问题
2344:【入门】骨牌铺方格  递推 </div>