codeforces 266B QueueattheSchool program in java

QueueattheSchool.java

import java.util.Scanner;

public class QueueattheSchool
{
    public static void main(String[] args)
    {
        Scanner z=new Scanner(System.in);
        int n=z.nextInt();
        int t=z.nextInt();
        String s=z.next();
        for(int i=1;i<=t;i++)
        {
            if(s.contains("BG"))
                s=s.replaceAll("BG", "GB");
        }
        System.out.println(s);
    }
}