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技術 leetcode with python:387. First Unique Character in a String

題目: Given a string s, find the first non-repeating character in it and return i...

技術 leetcode with python:383. Ransom Note

題目: Given two strings ransomNote and magazine, return true if ransomNote can be...

技術 leetcode with python:18. 4Sum

題目: Given an array nums of n integers, return an array of all the unique quadru...

技術 leetcode with python:17. Letter Combinations of a Phone Number

題目: Given a string containing digits from 2-9 inclusive, return all possible le...

技術 leetcode with python:16. 3Sum Closest

題目: Given an integer array nums of length n and an integer target, find three i...

技術 leetcode with python:374. Guess Number Higher or Lower

題目: We are playing the Guess Game. The game is as follows: I pick a number fr...

技術 leetcode with python:367. Valid Perfect Square

題目: Given a positive integer num, write a function which returns True if num is...

技術 leetcode with python:350. Intersection of Two Arrays II

題目: Given two integer arrays nums1 and nums2, return an array of their intersec...

技術 leetcode with python:349. Intersection of Two Arrays

題目: Given two integer arrays nums1 and nums2, return an array of their intersec...

技術 leetcode with python:345. Reverse Vowels of a String

題目: Given a string s, reverse only all the vowels in the string and return it....

技術 leetcode with python:344. Reverse String

題目: Write a function that reverses a string. The input string is given as an ar...

技術 leetcode with python:342. Power of Four

題目: Given an integer n, return true if it is a power of four. Otherwise, return...

技術 leetcode with python:338. Counting Bits

題目: Given an integer n, return an array ans of length n + 1 such that for each...

技術 leetcode with python:15. 3Sum

題目: Given an integer array nums, return all the triplets [nums[i], nums[j], num...

技術 leetcode with python:12. Integer to Roman

題目: Roman numerals are represented by seven different symbols: I, V, X, L, C, D...

技術 leetcode with python:11. Container With Most Water

題目: You are given an integer array height of length n. There are n vertical lin...

技術 leetcode with python:8. String to Integer (atoi)

題目: Implement the myAtoi(string s) function, which converts a string to a 32-bi...

技術 leetcode with python:326. Power of Three

題目: Given an integer n, return true if it is a power of three. Otherwise, retur...

技術 leetcode with python:303. Range Sum Query - Immutable

題目: Given an integer array nums, handle multiple queries of the following type:...

技術 leetcode with python:292. Nim Game

題目: You are playing the following Nim Game with your friend: Initially, there...

技術 leetcode with python:290. Word Pattern

題目: Given a pattern and a string s, find if s follows the same pattern. Here...

技術 leetcode with python:283. Move Zeroes

題目: Given an integer array nums, move all 0's to the end of it while maintainin...

技術 leetcode with python:278. First Bad Version

題目: You are a product manager and currently leading a team to develop a new pro...

技術 leetcode with python:7. Reverse Integer

題目: Given a signed 32-bit integer x, return x with its digits reversed. If reve...

技術 leetcode with python:268. Missing Number

題目: Given an array nums containing n distinct numbers in the range [0, n], retu...

技術 leetcode with python:263. Ugly Number

題目: An ugly number is a positive integer whose prime factors are limited to 2,...

技術 leetcode with python:258. Add Digits

題目: Given an integer num, repeatedly add all its digits until the result has on...

技術 leetcode with python:257. Binary Tree Paths

題目: Given the root of a binary tree, return all root-to-leaf paths in any order...

技術 leetcode with python:6. Zigzag Conversion

題目: The string "PAYPALISHIRING" is written in a zigzag pattern on a g...

技術 leetcode with python:5. Longest Palindromic Substring

題目: Given a string s, return the longest palindromic substring in s. 給定一個字串,找出...