3298134_ac_938ms_2032k.java

北大大牛代码 1240道题的原代码 超级权威

import java.util.*;
import java.io.*;

public class Main
{

	public static void main(String [] args)	throws IOException
	{
		new Main().run();
	}

	public void run()	throws IOException
	{
		String [] array = new String [10001];
		BufferedReader in = new BufferedReader (new InputStreamReader(System.in));
		String format, str, ret;
		int i, j, num;

		format = in.readLine();
		num = 1;
		while((str=in.readLine())!=null)
		{
			array[num++] = new String (str);
		}
		int index;
		ret = "";
		for(i = 0; i < format.length(); i++)
		{
			if(format.charAt(i)=='\\')
			{
				if(i+1!=format.length())
				{
					System.out.print(format.charAt(i+1));
				}
				i++;
				continue;
			}
			if(format.charAt(i)!='{')
			{
				System.out.print(format.charAt(i));
			}
			else
			{
				j = i+1;
				while(j < format.length()&&(format.charAt(j)=='+'||format.charAt(j)=='-'||Character.isDigit(format.charAt(j))))
				{
					j++;
				}
				String tmp = format.substring(i+1,j);
				if(tmp.length()==0||tmp.equals("+")||tmp.equals("-"))
					index = -1;
				else
				{
					if(tmp.charAt(0)=='+')
					{
						tmp = tmp.substring(1);
					}
					try
					{
						index = Integer.parseInt(tmp);
					}
					catch (Exception e)
					{
						index = -1;
					}
					
				}
				if(j==format.length()||format.charAt(j)!='}'||index < 1||index >= num)
				{
					System.out.print(format.charAt(i));
				}
				else
				{
					System.out.print(array[index]);
					i = j;
				}
			}
		}
		System.out.println(ret);
	}

}