###### tags: `ADA 6.4` # ADA 6.4: Space-Efficient Sequence Alignment 省空間的序列比對 ### Space-Efficient 就是在表格上走 shortest-path(最短路徑)  ### Shortest path in Graph 假設可以有一個中間點位置,可以讓起點到中間,中間到終點,是最短的路徑。  ### The Problem is which intermediate point is the shortest 所以還是必須要逐點計算  #### step1  ### step2  ### step3  ### step4  ### step5  ### step6  ### step7  ### step8  ### step9  ### step10  ### step11  ### step12  ## Conclusion 一次只計算一個小區域,最差的狀況下只有step7,用到的記憶體空間最多。 但遠比直接計算起點到終點來的少。所以才是省空間的演算法。而且時間複雜度並未增加。
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