C++

題目

Given an integer columnNumber, return its corresponding column title as it appears in an Excel sheet.

題目

There is an integer array nums sorted in ascending order (with distinct values).

題目

Given a directed acyclic graph, with n vertices numbered from 0 to n-1, and an array edges where edges[i] = [fromi, toi] represents a directed edge from node fromi to node toi.

… Read More »LeetCode: 1572-Matrix Diagonal Sum 解題紀錄

題目

Given two 0-indexed integer arrays nums1 and nums2, return a list answer of size 2 where:

• answer[0] is a list of all distinct integers in nums1 which are not present in nums2.
• answer[1] is a list of all distinct integers in nums2 which are not present in nums1.

題目

There is a function signFunc(x) that returns:

… Read More »LeetCode: 319-Bulb Switcher 解題紀錄

題目

You have a set which contains all positive integers [1, 2, 3, 4, 5, ...].

Implement the SmallestInfiniteSet class:

題目

You are given two strings word1 and word2. Merge the strings by adding letters in alternating order, starting with word1. If a string is longer than the other, append the additional letters onto the end of the merged string.