Description: Topic 1 describes the programming insert a new string specified position in the string, and then the results in reverse order output. For example, the existing string aaaaa, then request later in the first two characters of the string (from left to right number), insert a new string bbb, the results of the anti-sequence output aaabbbaa (all characters string length, whether it is the original length of the string, the length of the string to be added or inserted after the total length of the string, not more than 100, and these string contains only alphanumeric characters).
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问题描述.txt
11.1.txt
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