题目描述

<span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">输入一个数字</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">n</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">，判断其是否为质数，若是质数，输出“</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">yes</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">”，否则输出“</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">no</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">”。（质数条件：因数中只有</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">1和它本身）</span>

输入格式

<span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">输入一行是</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">一个</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">整数</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">n</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">。</span>

输出格式

<span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">输出一行</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">，</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">若是质数则输出</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">“</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">yes</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">”</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">，</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">不是质数则输出</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">“</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">no</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">”</span><span style="color:rgba(0,font-family:"font-size:14px;background-color:#FFFFFF;">。</span>

样例

样例 1

输入 # 1

3

输出 # 1

yes