classSolution {publicString removeDuplicates(String S) {char[] chars; Stack<Character> stack =newStack<>();for(charc : S.toCharArray()) {//if find the same char, remove it from stackif(!stack.empty() && c ==stack.peek()) { stack.pop(); }else{//put it into stackstack.push(c)...
这道题是之前那道Remove All Adjacent Duplicates In String的拓展,那道题只是让移除相邻的相同字母,而这道题让移除连续k个相同的字母,规则都一样,移除后的空位不保留,断开的位置重新连接,则有可能继续生成可以移除的连续字母。最直接暴力的解法就是多次扫描,每次都移除连续k个字母,然后剩下的字母组成新的字符串,...
Write a Java program to count the frequency of each character in a string and then output the string with duplicates removed. Write a Java program to remove duplicate letters from a string while preserving the order of their first appearance. Write a Java program to remove duplicate letters fro...
Few simple examples to find or count the duplicates in stream and remove the duplicates from stream in Java 8. We will use ArrayList to provide stream of elements including duplicates. Few simple examples to find and count the duplicates in aStreamand remove those duplicates sinceJava 8. We w...
1. UsingCollection.removeIf()to Remove Duplicates from OriginalList TheremoveIf()method removes all of the elements of this collection that satisfy a specifiedPredicate. Each matching element is removed usingIterator.remove(). If the collection’s iterator does not support removal, then anUnsupportedOp...
How to remove duplicates from a List in Java There are several ways to find duplicates in a Java List, array or other collection class. The following list describes some of the most commonly used approaches: Use a method in the Java Streams API to remove duplicates from a List. ...
原题链接在这里:https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string/ 题目: Given a stringSof lowercase letters, aduplicate removalconsists of choosing two adjacent and equal letters, and removing them. We repeatedly make duplicate removals on S until we no longer can. ...
Write a Java program to remove duplicates from a given stack. Sample Solution: Java Code: importjava.util.Scanner;importjava.util.HashSet;publicclassStack{privateint[]arr;privateinttop;// Constructor to initialize the stackpublicStack(intsize){arr=newint[size];top=-1;}// Method to push an...
packageLeetCode_1209importjava.util.*/*** 1209. Remove All Adjacent Duplicates in String II *https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string-ii/description/* * Given a string s, a k duplicate removal consists of choosing k adjacent and equal letters from s and removi...
原题链接在这里:https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string-ii/ 题目: Given a strings, akduplicate removalconsists of choosingkadjacent and equal letters fromsand removing them causing the left and the right side of the deleted substring to concatenate together. ...