Poj Solution 2894

http://poj.org/problem?id=2894

//* @author ������<hongxp11@163.com>
import java.util.Scanner;

public class Main{
    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        int t = in.nextInt();
        for(int i = 0; i< t; i++)
        {
            int n = in.nextInt();
            int[] result = new int[1012];
            int min = 1000;
            int max = 0;
            for(int j = 0; j< n; j++)
            {
                String x = in.next();
                int begin = in.nextInt();
                int end = in.nextInt();
                for(int k = begin; k< end; k++)
                    result[k]++;
                if(max< end)
                    max = end;
                if(min>begin)
                    min = begin;
            }
            for(int j = min; j< max; j++)
            {
                if(result[j]!=0)
                {
                    char res = (char)(result[j]+'A'-1);
                    System.out.print(res);
                }
            }
            System.out.println();
        }
    }
}