Pakkaus

import java.util.Scanner;

public class Paks {
	static void out(int n, String s) {
		for(int i = 0; i < n; i++) System.out.print(s);
	}
	
	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		String s = input.nextLine();
		
		int curCount = 0;
		String curString = "";
		
		for(int i = 0; i < s.length(); i++) {
			if(i == s.length()-1) {
				out(curCount, curString + s.charAt(i));
			} else if(!Character.isDigit(s.charAt(i)) && Character.isDigit(s.charAt(i+1))) {
				out(curCount, curString + s.charAt(i));
				curCount = 0;
				curString = "";
			} else if(Character.isDigit(s.charAt(i))) {
				curCount *= 10;
				curCount += Integer.parseInt(s.charAt(i) + "");
			} else {
				curString += s.charAt(i);
			}
		}
		
		System.out.println();
		input.close();
	}
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED

Test 10

Group: 2

Verdict: ACCEPTED

Test 11

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 12

Group: 3

Verdict: ACCEPTED

Test 13

Group: 3

Verdict: ACCEPTED

Test 14

Group: 3

Verdict: ACCEPTED

Test 15

Group: 3

Verdict: ACCEPTED