hdu 2500

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		while(sc.hasNext()) {
			int n=sc.nextInt();
			for(int i=0;i<n;i++) {
				int num=sc.nextInt();
				String str="HDU";
				for(int j=0;j<num*3;j++)
					for(int k=0;k<num;k++) {
						System.out.print(str);
						if(k==num-1)
							System.out.println();
					}
			}
		}
		sc.close();
	}
}

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转载自blog.csdn.net/qq_40215528/article/details/83315441