给你一个字符串s,请你去除字符串中重复的字母,使得每个字母只出现一次。需保证返回结果的字典序最小(要求不能打乱其他字符的相对位置)。 示例1: 输入:s = "bcabc"输出:"abc" 示例2: 输入:s = "cbacdcbc"输出:"acdb" 提示: 1 <= s.length <= 104 s由小写英文字母组成 注意:该题与 1081https://...
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https://leetcode.com/problems/sum-of-two-integers/discuss/84290/Java-simple-easy-understand-solution-with-explanation https://leetcode.com/problems/sum-of-two-integers/discuss/84278/A-summary%3A-how-to-use-bit-manipulation-to-solve-problems-easily-and-efficiently LeetCode All in One 题目讲解汇总...
In order to keep the air clean, the government bans all military vehicles. So the army must take buses to go to the airport. There may be more than one road between two bus stations. If a bus station is destroyed, all roads connecting that station will become no use. What’s Gabi...
Hi Stefan, I noticed that you use a lot of Python tricks in your solutions, like "v += val," and so on... Could you share where you found them, or how your learned about them, and maybe where we can find more of that? Thanks! StefanPochmann 也不厌其烦地给出了自己的答案: @ag...
Could you optimize your algorithm to use only O(k) extra space? 【解答】有了 Pascal’s Triangle,这道题就很好解了,但是注意题目给的 example,它是从第 0 行开始计数的,而不是第 1 行: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 public class Solution { public List<Integer> getRow(int...
// Solution 1: Use a hash table to record the index of every element and look for target - a[i] in the hash table. Positive, bingo; negative, keep looking. Time and space are both O(N). Will do. 代码1 //Code 1 解法2:把数组排序,然后前后两指针向中间靠拢。如果数组本身有序,此方...
Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not use the same element twice. Example: Given nums = [2, 7, 11, 15], target = 9, ...
【题目】The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) P A H N A P L S I I G Y I R ...
How to use Local debugging Installation(help) Install via plug-in library https://plugins.jetbrains.com/plugin/12132-leetcode-editor Install by downloading the file https://github.com/shuzijun/leetcode-editor/releases Configuration (configuration for first installation) Configuration path: File -> se...