优化因式分解，以减少取整误差的引入。

Two methods area optimizing factorization to decrease the error of rounding operations.

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其余函数部分用于将结果取整，得出小时和分钟结果，组成结果字符串。

The remainder of the function consists of rounding up the result to hours and minutes and constructing the result string.

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运用单纯形方法的一个问题是解为小数值，作者用一个简单的方法进行取整。

One problem caused by using simplex method is that the results are fractional values while need integers, and that provides a simple but effective method to solve it.

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