題目在上面, 要求公式 , 頗複雜的
更新1:
新田美香 ,你條公式好似唔係好得....
更新2:
兩位好似好熟, 等我研究完大家的答案的簡易程度 及 速度後, 會再比分
更新3:
array formula 雖然好好用, 但係比較慢, 因我的data 往往有過萬row
更新4:
biglin . i tested your file. the answer is correct in my provided data...however, if i added more data ,such as add 5 in next 10 cells, your answer still 3372 . but the correct answer should go to 25 finally . maybe my question not good as all data is bigger than previous one