LeetCode

題目

Given a balanced parentheses string s, return the score of the string.

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… Read More »LeetCode: 138-Copy List with Random Pointer 解題紀錄

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Given the head of a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list. Return the linked list sorted as well.

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Given an integer n, return an array ans of length n + 1 such that for each i (0 <= i <= n), ans[i] is the number of 1's in the binary representation of i.

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Given a reference of a node in a connected undirected graph.

Return a deep copy (clone) of the graph.

Each node in the graph contains a value (int) and a list (List[Node]) of its neighbors.

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Given a string columnTitle that represents the column title as appear in an Excel sheet, return its corresponding column number.