Problems Description
<span style="font-family:宋体;font-size:12pt;">输入</span><span style="font-family:'Times New Roman';font-size:12pt;">10</span><span style="font-family:宋体;font-size:12pt;">items角的度数</span><span style="font-family:'Times New Roman';font-size:12pt;">a</span><span style="font-family:宋体;font-size:12pt;">，先判断这items角是否是直角，如果是就统计直角的items数</span><span style="font-family:'Times New Roman';font-size:12pt;">r</span><span style="font-family:宋体;font-size:12pt;">！</span>
Input格式
10items整数
Output格式
一items整数
Sample
Sample Input 1
30 90 45 60 90 90 25 145 270 90
Sample Output 1
4
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