Write a Java program to remove duplicate letters and arrange them in lexicographical order from a given string containing only lowercase letters. Note: In mathematics, the lexicographic or lexicographical order (also known as lexical order, dictionary order, alphabetical order or lexicographic(al) produ...
publicString removeDuplicateLetters(String s) {if(s ==null)returnnull;elseif(s.trim() == "") {return""; } String res= "0";//存储结果Map<Character,Integer> map =newHashMap<Character, Integer>();//记录各个字符出现的次数boolean[] visited =newboolean[256];//记录字符是否已经被访问过//...
java: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 classSolution{publicStringremoveDuplicateLetters(String s){StringBuilder sb=newStringBuilder();int[]count=newint[26];boolean[]used=newboolean[26];char[]chs=s.toCharArray();for(char c:chs){count[c-'a']++;}for(char c:chs){count[c-'...
Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sure your result is the smallest in lexicographical order among all possible results. Example: Given “bcabc” Return “abc” Given “cbacdcbc” Return ...
316. Remove Duplicate Letters packageLeetCode_316importjava.lang.StringBuilder/*** 316. Remove Duplicate Letters *https://leetcode.com/problems/remove-duplicate-letters/description/*https://www.youtube.com/watch?v=SrlvMmfG8sA* * Given a string which contains only lowercase letters,...
Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sure your result is the smallest in lexicographical order among all possible results. Example: Given"bcabc" ...
Java PHP Explanation: Here is a breakdown of the above Python code: Function definition: The code defines a function named "no_consecutive_letters()" that takes a string (txt) as an argument. Return Statement: The function returns the first character of the string concatenated with the charact...
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No order is required for the final output.You may assume the directory name, file name and file content only has letters and digits, and the length of file content is in the range of [1,50].The number of files given is in the range of [1,20000].You may assume no files or directo...