原创 Integer to Roman
Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999. 此題找規律模擬操
2020-02-23 13:13:15
原创 Jump Game
Given an array of non-negative integers, you are initially positioned at the first index of the array. Each element i
2020-02-23 13:13:15
原创 Course Schedule
There are a total of n courses you have to take, labeled from 0 to n - 1. Some courses may have prerequisites, for e
2020-02-23 13:13:15
原创 Number of Digit One
Given an integer n, count the total number of digit 1 appearing in all non-negative integers less than or equal to n.
2020-02-23 13:13:15
原创 Add Two Numbers
You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each
2020-02-23 13:13:15
原创 Two Sum
Given an array of integers, find two numbers such that they add up to a specific target number. The function twoSum s
2020-02-23 13:13:15
原创 Reverse Integer
Reverse digits of an integer. Example1: x = 123, return 321 Example2: x = -123, return -321 對於數值問題，首先一定要記住，一定要時刻注意溢出問
2020-02-23 13:13:04
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原创 Roman to Integer
Given a roman numeral, convert it to an integer. Input is guaranteed to be within the range from 1 to 3999. 和整數轉羅馬數字
2020-02-23 13:13:04
原创 Longest Common Prefix
Write a function to find the longest common prefix string amongst an array of strings. 求解最長公共前綴，看到第一反應是用trie樹，簡歷一顆trie樹
2020-02-23 13:13:04
原创 String to Integer (atoi)
Implement atoi to convert a string to an integer. Hint: Carefully consider all possible input cases. If you want a ch
2020-02-23 13:13:04
原创 ZigZag Conversion
The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to disp
2020-02-23 13:13:04
原创 Container With Most Water
Given n non-negative integers a1, a2, ..., an, where each represents a point at coordinate (i, ai). n vertical lines
2020-02-23 13:13:04
原创 Median of Two Sorted Arrays
There are two sorted arrays nums1 and nums2 of size m and n respectively. Find the median of the two sorted arrays. Th
2020-02-23 13:13:04
原创 Longest Palindromic Substring
Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000,
2020-02-23 13:13:04
原创 Triangle
Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row
2018-08-30 13:11:46