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- import java.util.Scanner;
- public class E01ValidUsernames {
- public static void main(String[] args) {
- Scanner scanner = new Scanner(System.in);
- String[] array = scanner.nextLine().trim().split(", ");
- for (String username : array) {
- boolean isValid = true;
- if (username.length() < 3 || 16 < username.length()) {
- isValid = false;
- }
- for (int j = 0; j < username.length(); j++) {
- char symbol = username.charAt(j);
- if (!Character.isLetterOrDigit(symbol) && symbol != '-' && symbol != '_') {
- isValid = false;
- }
- }
- if (isValid) {
- System.out.println(username);
- }
- }
- }
- }
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