## Solution to Implement Trie (Prefix Tree) by LeetCode

1 Jan

Question: https://leetcode.com/problems/implement-trie-prefix-tree/ Question Name: Implement Trie (Prefix Tree) Not a full implementation. The delete function is not required.

## Solution to Course Schedule by LeetCode

22 Dec

Question: https://leetcode.com/problems/course-schedule/ Question Name: Course Schedule

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3 Sep

## Solution to Isomorphic Strings by LeetCode

1 Sep

Question: https://leetcode.com/problems/isomorphic-strings/ Question Name: Isomorphic Strings The key point is to avoid 2+ characters map to the same character.

## Solution to Count Primes by LeetCode

29 Aug

Question: https://leetcode.com/problems/count-primes/ Question Name: Count Primes

29 Aug

## Solution to Happy Number by LeetCode

29 Aug

Question: https://leetcode.com/problems/happy-number/ Question Name: Happy Number

## Solution to Bitwise AND of Numbers Range by LeetCode

23 Aug

Question: https://leetcode.com/problems/bitwise-and-of-numbers-range/ Question Name: Bitwise AND of Numbers Range A variant of number of 1 bits in an interger. For any non-zero interger 0b?????????1000 (? could be 1 or 0, and there are zero or one or more 0s after … Read More »

## Solution to Number of Islands by LeetCode

31 Jul

Question: https://leetcode.com/problems/number-of-islands/ Question Name: Number of Islands A variant of weighted quick union.

## Solution to Binary Tree Right Side View by LeetCode

18 Jun

Question: https://leetcode.com/problems/binary-tree-right-side-view/ Question Name: Binary Tree Right Side View A variant of level order tree traversal.