Problems Description
<p class="p0" style="text-indent:24.0000pt;"> 美丽的海滨城市青岛,如同我们所知problems的,是一items多丘陵的城市。不瞒你说,<span>qtech</span><span>的一items大四的弱菜</span><span>671coder</span><span>的家,就坐落在青岛的某items丘陵的顶上。</span><span>671coder</span><span>平时最喜欢去家门口的牛肉粉店去吃牛肉粉!</span> </p> <p class="p0" style="text-indent:24.0000pt;"> 牛肉粉可是青岛的特产,可是在牛肉粉店里有这么一items规矩,如果你的粉不够,可以去加粉,一碗粉五毛钱,而<span>671coder</span><span>总喜欢请自己的一些好基友去吃,就想</span><span>hfhhxh</span><span>、</span><span>xindoo</span><span>、</span><span>qining</span><span>、</span><span>yubing</span><span>、</span><span>xiaopengyou</span><span>……加一碗粉</span><span>5</span><span>毛钱,聪明的你,帮</span><span>671coder</span><span>计算下,帮所有人加粉需要多少钱吧!</span> </p> <p class="p0"> </p>
Input格式
<p class="p0" style="text-indent:24.0000pt;"> 先输入一items<span>n(n<=100)</span><span>,代表有</span><span>n</span><span>items人。</span> </p> <p class="p0" style="text-indent:24.0000pt;"> 下一行有<span>n</span><span>items整数</span><span>mi(i = 1 -> n mi</span><span>表示Page </span><span>i</span><span>items人需要加的数量</span><span>)</span><span>。</span> </p> <p class="p0"> </p>
Output格式
<p class="p0" style="text-indent:24.0000pt;"> 对于每组测试数据,输出<span>671coder</span><span>需要花费的</span><span>money</span> </p> <p class="p0"> </p>
Sample
Sample Input 1
5
1 2 3 4 5
2
2 2
Sample Output 1
7.5
2
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