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9月 7 2017
Online Judge►LeetCode

[LeetCode] 230 - Kth Smallest Element in a BST

題意

在 Binary Search Tree 中找到第 K 小的元素。

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  • 230
  • BST
  • LeetCode
  • Tree
9月 6 2017
Online Judge►LeetCode

[LeetCode] 144 - Binary Tree Preorder Traversal

題意

使用非遞迴的方式 Preorder Traversal 二元樹。

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  • 144
  • LeetCode
  • Tree
9月 6 2017
Online Judge►LeetCode

[LeetCode] 142 - Linked List Cycle II

題意

在沒有額外空間且不修改的情況下判斷 Linked List 是否有環,並且回傳該環的起點。

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  • 142
  • LeetCode
9月 6 2017
Online Judge►LeetCode

[LeetCode] 141 - Linked List Cycle

題意

在沒有額外空間的情況下判斷 Linked List 是否有環。

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  • 141
  • LeetCode
9月 6 2017
Online Judge►LeetCode

[LeetCode] 102 - Binary Tree Level Order Traversal

題意

Level Order Traversal 二元樹。

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  • 98
  • LeetCode
  • Tree
9月 6 2017
Online Judge►LeetCode

[LeetCode] 98 - Validate Binary Search Tree

題意

判斷是否為二元搜尋樹。

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  • 98
  • LeetCode
  • Tree
9月 6 2017
Online Judge►LeetCode

[LeetCode] 94 - Binary Tree Inorder Traversal

題意

使用非遞迴的方式 Inorder Traversal 二元樹。

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  • 94
  • LeetCode
  • Tree
9月 6 2017
Online Judge►LeetCode

[LeetCode] 64 - Minimum Path Sum

題意

給一個 m x n 填滿非負數的矩陣,從左上方開始往右下走且每一步只能往右或往下走,求最小數字總和。

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  • 64
  • LeetCode
  • dp
9月 3 2017
Online Judge►LeetCode

[LeetCode] 59 - Spiral Matrix II

題意

同 54 - Spiral Matrix ,模擬繞圈遍歷矩陣即可。

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  • 59
  • LeetCode
8月 31 2017
Online Judge►Codewars

[Codewars] 4 kyu - Sum Strings as Numbers

題意

大數相加。

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  • 4 kyu
  • Codewars
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Recents

  • [LeetCode] 670 - Maximum Swap
  • [LeetCode] 654 - Maximum Binary Tree
  • [LeetCode] 647 - Palindromic Substrings
  • [LeetCode] 560 - Subarray Sum Equals K
  • [LeetCode] 515 - Find Largest Value in Each Tree Row
  • [LeetCode] 513 - Find Bottom Left Tree Value
  • [LeetCode] 508 - Most Frequent Subtree Sum
  • [LeetCode] 451 - Sort Characters By Frequency
  • [LeetCode] 442 - Find All Duplicates in an Array
  • [LeetCode] 287 - Find the Duplicate Number

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