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代码说明：

  五对角线性方程组求解程序. 速度奇快.一千阶,0.019秒 一万阶:0.56秒 10万阶:61秒. 数据输入结构见程序内英文说明.(Five linear equations solver. The speed of a swift pace. A thousand bands, ten thousand bands 0.019 seconds: 0.56 seconds 100,000 bands: 61 seconds. Data input structure see process description in English.)