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poweihuang17 / practice_leetcode_and_interview

coding practice for my interview about google or other companies. Mainly about leetcode or other practice.
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0409的四題leetcode題 #15

Closed poweihuang17 closed 6 years ago

poweihuang17 commented 6 years ago

722,794, 772, 297 (可能要把construct string from binary 或 construct binary from string 那題基礎題也先做了） 所以可能會變4+1就是了。 應該還好。

poweihuang17 commented 6 years ago

再弄下去，碩論和人生會變很崩壞。先暫停，休息一下。享受一下人生。

poweihuang17 commented 6 years ago

Finish 722.

poweihuang17 commented 6 years ago

Finish 794.

poweihuang17 commented 6 years ago

772是Basic Calculator III，如果能把224, 227都弄了的話，772應該是沒問題。

poweihuang17 commented 6 years ago

這樣來說，772 和 297都有子題，有點麻煩。

poweihuang17 commented 6 years ago

finish 224 and 227. 覺得在現場很難寫出來.....

poweihuang17 commented 6 years ago

這一類的問題有四題，就是各種組合。然後問題都是因為Postfix。看起來轉成postfix是最簡單的。不用postfix，stack會很麻煩。這邊有個generic solution的貼文。 https://leetcode.com/problems/basic-calculator-iii/discuss/113592/Development-of-a-generic-solution-for-the-series-of-the-calculator-problems

poweihuang17 commented 6 years ago

應該找一些postfix的題目先來做。

poweihuang17 commented 6 years ago

我覺得這題calculator其實不太會考，先看serialize那題吧。

poweihuang17 commented 6 years ago

現在412了。我做了4題。

poweihuang17 commented 6 years ago

完成536。兩個tree的小題都做完了。

poweihuang17 commented 6 years ago

Finish 297.

poweihuang17 commented 6 years ago

772需要好好想，改成先弄212。

poweihuang17 commented 6 years ago

解決了212。今天的四題都弄完了。棒。Calculator改明天。