求 S=a+aa+aaa+…+aaaa…a 之值
求 S=a+aa+aaa+…+aaaa…a 之值，其中a是一个数字。例如：2+22+222+2222+22222（此时n=5）, n由键盘输入。...
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字符串如下 [["5395722","527781","aaaa"],["5395722","527781","bbb"],["5395722","527781","bbb"]] 要一行一行的
字符串如下 [["5395722","527781","aaaa"],["5395722","527781","bbb"],["5395722","527781","bbb"]] 要一行一行的取出数据 然后再封装到POJO类中去...
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