Problems Description
<span style="color:#666666;font-family:Arial;line-height:15px;background-color:#FFFFFF;"> A班有nitems同学，今年的期末Exam进行了数学和语文两门学科的Exam，现在班主任手上拿到了他们的成绩单，</span><br /> <span style="color:#666666;font-family:Arial;line-height:15px;background-color:#FFFFFF;"> 她现在希望你能编写一items程序，points别求出语文成绩的平均points和数学成绩的平均points。</span><br /> <span style="color:#666666;font-family:Arial;line-height:15px;background-color:#FFFFFF;"> 所有输出场宽为5，保留两位小数。</span><br /> <span style="color:#666666;font-family:Arial;line-height:15px;background-color:#FFFFFF;">输入：</span><br /> <span style="color:#666666;font-family:Arial;line-height:15px;background-color:#FFFFFF;"> Page 一行为n</span><br /> <span style="color:#666666;font-family:Arial;line-height:15px;background-color:#FFFFFF;"> 后面n行每行两items整数表示语文和数学成绩</span><br /> <span style="color:#666666;font-family:Arial;line-height:15px;background-color:#FFFFFF;">输出：</span><br /> <span style="color:#666666;font-family:Arial;line-height:15px;background-color:#FFFFFF;"> Page 一行为语文成绩平均points</span><br /> <span style="color:#666666;font-family:Arial;line-height:15px;background-color:#FFFFFF;"> Page 二行为数学成绩平均points</span>
Input格式
<span style="color:#666666;font-family:'Courier New';line-height:15px;background-color:#FFFFFF;">4</span><br /> <span style="color:#666666;font-family:'Courier New';line-height:15px;background-color:#FFFFFF;">40 56</span><br /> <span style="color:#666666;font-family:'Courier New';line-height:15px;background-color:#FFFFFF;">34 66</span><br /> <span style="color:#666666;font-family:'Courier New';line-height:15px;background-color:#FFFFFF;">89 100</span><br /> <span style="color:#666666;font-family:'Courier New';line-height:15px;background-color:#FFFFFF;">45 89</span>
Output格式
<span style="color:#666666;font-family:'Courier New';line-height:15px;background-color:#FFFFFF;">52.00</span><br /> <span style="color:#666666;font-family:'Courier New';line-height:15px;background-color:#FFFFFF;">77.75</span>
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