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259. 3Sum Smaller

2018-04-15
Leetcode
270 words 1 min read

題目連結

雙指針好題!

思考看看,如何透過雙指針來達成 $O(N^2)$!(hint: 枚舉一數字)

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766. Toeplitz Matrix

2018-04-15
Leetcode
346 words 1 min read

題目連結

想想看… 怎麼 one pass 進行檢查呢?

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280. Wiggle Sort

2018-04-15
Leetcode
274 words 1 min read

題目連結

觀察題。

Linear time solution 真的太牛逼了!

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687. Longest Univalue Path

2018-04-15
Leetcode
277 words 1 min read

題目連結

經典 DFS 題!

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271. Encode and Decode Strings

2018-04-15
Leetcode
270 words 1 min read

題目連結

一題很讚的設計題。

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