小ze要过四级

<p class="MsoNormal" align="left" style="margin-left: 36pt; line-height: 15.75pt"><span style="color: #231f17; font-family: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">小Ze虽然已经立志要好好学习了，但是现在四级还没有过</span><span style="color: #231f17; font-family: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">，即使还没资格考四级，小Ze童鞋也决定要在20天内背200个单词</span><span style="color: #231f17; font-family: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">。但是小嫒觉得200个单词太少了，于是要求小Ze当天没有将所有的单词背完</span><span style="color: #231f17; font-family: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">,第二天要背的单词总量就会增加百分之K(在总量的增长中，允许小数的出现)，已知小Ze每天可以背N个单词</span><span style="color: rgb(35,31,23); font-family: 宋体">。求小Ze多少天可以完成任务。</span></p> <p class="MsoNormal" align="left" style="margin-left: 36pt; line-height: 15.75pt">（比如当K为10时，第一天任务总量是200，第二天就是220）</p> <p></p>

<p class="MsoNormal" align="left" style="margin-left: 36pt; line-height: 15.75pt"><span style="color: #231f17; font-family: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">测试数据有多组，每组有一行两个整数</span><span lang="EN-US" style="color: #231f17; font-family: &quot;Verdana&quot;,&quot;sans-serif&quot;; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-fareast-font-family: 宋体">N</span><span style="color: #231f17; font-family: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">（</span><span lang="EN-US" style="color: #231f17; font-family: &quot;Verdana&quot;,&quot;sans-serif&quot;; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-fareast-font-family: 宋体">10&lt;=N&lt;=50</span><span style="color: #231f17; font-family: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">）</span><span lang="EN-US" style="color: #231f17; font-family: &quot;Verdana&quot;,&quot;sans-serif&quot;; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-fareast-font-family: 宋体">, K</span><span style="color: #231f17; font-family: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">（</span><span lang="EN-US" style="color: #231f17; font-family: &quot;Verdana&quot;,&quot;sans-serif&quot;; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-fareast-font-family: 宋体">1&lt;=K&lt;=20</span><span style="color: #231f17; font-family: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">）</span><span lang="EN-US" style="color: #231f17; font-family: &quot;Verdana&quot;,&quot;sans-serif&quot;; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-fareast-font-family: 宋体"><o:p></o:p></span></p> <p></p>

<p class="MsoNormal" align="left" style="margin-left: 36pt"><span style="color: rgb(35,31,23); line-height: 15.75pt; font-family: 宋体">每组数据输出一行，据如果小ze能完成任务，则输出一个</span><span style="color: rgb(35,31,23); line-height: 15.75pt; font-family: 宋体">整数M，代表小ze完成任务需要的天数，否则输出&ldquo;</span><font face="宋体" color="#231f17"><span style="line-height: 21px">Impossible</span></font><span style="color: rgb(35,31,23); line-height: 15.75pt; font-family: 宋体">&rdquo;。</span></p>