Problems Description
<span style="color:#336699;font-family:'Times New Roman';font-size:18px;line-height:28px;background-color:#BBD8E9;">求一items数的绝对值，大于等于0的数的绝对值为本身，负数的绝对值就是其去掉负号的值</span>
Input格式
<span style="color:#336699;font-family:'Times New Roman';font-size:18px;line-height:28px;background-color:#BBD8E9;">一行，一items整数</span>
Output格式
<span style="color:#336699;font-family:'Times New Roman';font-size:18px;line-height:28px;background-color:#BBD8E9;">一行，输出这items整数的绝对值</span>
Sample
Sample Input 1
-9
Sample Output 1
9
Submit Code
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