poj 2503

用Map根据key查找value

Memory:19828K

Time:1547MS

import java.util.Map;
import java.util.HashMap;
import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main{
    public static void main(String[] args) throws Exception{
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        Map<String,String> map = new HashMap<String,String>();
        String line = null;
        String words[];
        while(true){
            line = bf.readLine();
            if(line.equals(""))
                break;
            words = line.split(" ");
            map.put(words[1],words[0]);
        }
        while(bf.ready()){
            line = bf.readLine();
            String result = map.get(line);
            if(result==null)
                System.out.println("eh");
            else
                System.out.println(result);
        }
    }
}