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@ -84,7 +84,7 @@ int main()
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// string l = "";
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// auto now_buf_pos = input_file_stream.tellg();
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// const auto get_buf_len = [&now_buf_pos,&input_file_stream,&buf](){
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// if(const auto new_buf_pos = input_file_stream.tellg(); new_buf_pos!=-1)[[likely]]{
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// if(const auto new_buf_pos = input_file_stream.tellg(); new_buf_pos!=-1)[[likely]]{ //注意tellg()也是io操作,耗时
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// const auto old_buf_pos = now_buf_pos;
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// now_buf_pos = new_buf_pos;
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// // auto ret = new_buf_pos - old_buf_pos;
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