내 인생에도 예쁜 꽃이 피었으면 좋겠다

https://www.hackerrank.com/challenges/duplicate-word/problem?isFullScreen=true Java Regex 2 - Duplicate Words | HackerRank Identify repeated words in the sentence, and delete all recurrences of each word after the very first word. www.hackerrank.com https://docs.oracle.com/javase/tutorial/essential/regex/pattern.html Methods of the Pattern Class (The Java™ Tutorials > Essential Java Classes > Re..

https://www.hackerrank.com/challenges/java-regex/problem?isFullScreen=true Java Regex | HackerRank Use the power of Java regex to detect valid IP address. www.hackerrank.com IP주소 조건 : IP 주소는 "A.B.C.D" 형태의 문자열로, 여기서 A, B, C, D의 값은 0에서 255 사이일 수 있습니다. 선두에 오는 0은 허용됩니다. A, B, C 또는 D의 길이는 3을 초과할 수 없습니다. 정규식 확인할 수 있는 사이트 https://regexr.com/ RegExr: Learn, Build, & Test RegEx RegExr is an online tool t..

https://www.hackerrank.com/challenges/pattern-syntax-checker/problem?isFullScreen=true Pattern Syntax Checker | HackerRank Given a regex, determine if the pattern is valid or not using Pattern.compile method. www.hackerrank.com import java.util.Scanner; import java.util.regex.*; public class Solution { public static void main(String[] args){ Scanner in = new Scanner(System.in); int testCases = I..

https://www.hackerrank.com/challenges/java-string-tokens/problem?isFullScreen=true Java String Tokens | HackerRank Find the number of alphabetic tokens in a string. www.hackerrank.com import java.io.*; import java.util.*; public class Solution { public static void main(String[] args) { Scanner scan = new Scanner(System.in); String s = scan.nextLine().trim(); if(s.length()

Anagram, 애니어그램 단어나 문장의 나열의 순서를 변경했을 때 다른 의미를 가지는 단어나 문장 https://www.hackerrank.com/challenges/java-anagrams/problem?isFullScreen=true Java Anagrams | HackerRank Given two strings, determine of they are anagrams of each other. www.hackerrank.com import java.util.Scanner; public class Solution { static boolean isAnagram(String a, String b) { // Complete the function boolean result = false; String ..

palindrome 팰린드롬, 회문 순서를 거꾸로 읽어도 제대로 읽은 것과 같은 단어와 문장. 예) "level", "SOS", "rotator", "nurses run".. https://www.hackerrank.com/challenges/java-string-reverse/problem?isFullScreen=true Java String Reverse | HackerRank Learn how to reverse a string. Given a string, determine if its a palindrome. www.hackerrank.com import java.io.*; import java.util.*; public class Solution { public static void main(..

https://www.hackerrank.com/challenges/java-string-compare/problem?isFullScreen=true Java Substring Comparisons | HackerRank Lexicographically compare substrings of length 'k'. www.hackerrank.com import java.util.Scanner; public class Solution { public static String getSmallestAndLargest(String s, int k) { //String smallest = ""; //String largest = ""; String smallest = s.substring(0,k); String l..

https://www.hackerrank.com/challenges/java-substring/problem?isFullScreen=true Java Substring | HackerRank Given a string, print a substring for a range of indices. www.hackerrank.com import java.io.*; import java.util.*; import java.text.*; import java.math.*; import java.util.regex.*; public class Solution { public static void main(String[] args) { Scanner in = new Scanner(System.in); String S..

https://www.hackerrank.com/challenges/java-strings-introduction/problem?isFullScreen=true Java Strings Introduction | HackerRank Learn how to declare a string and perform basic operations. www.hackerrank.com import java.io.*; import java.util.*; public class Solution { public static void main(String[] args) { Scanner sc=new Scanner(System.in); String A=sc.next(); String B=sc.next(); /* Enter you..

https://www.hackerrank.com/challenges/java-currency-formatter/problem?isFullScreen=true Java Currency Formatter | HackerRank Format Currency in Java www.hackerrank.com [에러1] import java.util.*; import java.text.*; public class Solution { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); double payment = scanner.nextDouble(); scanner.close(); // Write your code he..