PO11_WordOrNumber_3

package Homework_Loops;

import java.util.Scanner;

public class PO11_WordOrNumber_3 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = Integer.parseInt(scanner.nextLine());
        int num = 0;
        int numSum = 0;
        Character previous = ' ';
        String text = " ";
        StringBuilder sb = new StringBuilder();
        boolean isNumber = false;


        for (int i = 0; i < n; i++) {
            //read user input
            text = scanner.nextLine();

            //check if text contains only numbers
            isNumber = text.matches("[0-9]+");

            //if text contains only numbers

            if (isNumber) {
                if (previous == 'w') {
                    System.out.println(sb);
                    sb.setLength(0);
                }
                num = Integer.parseInt(text);
                numSum += num;
                previous = 'n';

            }

            //if text is a word
            if (!isNumber) {
                if (previous == 'n') {
                    System.out.printf("%d\n", numSum);
                    numSum = 0;
                }

                if (sb.length() != 0)
                    sb.append('-');
                sb.append(text);
                previous = 'w';
            }

        }


        if (previous == 'w') {
               System.out.println(sb);
           }


        if (previous == 'n'){
            System.out.println(numSum);
        }
    }
}