POJ1219 L-I-N-G-O: LINGO

来源：互联网发布：设ab都是n阶对称矩阵编辑：程序博客网时间：2024/04/30 03:33
题目：http://acm.pku.edu.cn/JudgeOnline/problem?id=1219
思路：题目不难，但千万读清楚题，输入输出也有陷阱。。。
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader read = new BufferedReader(new InputStreamReader(
                System.in));
        String s;
        String r;
        int time;
        char[] last;
        StringBuilder temp;
        char[] buff;
        int pos;
        boolean[] used;
        game: while (!(s = read.readLine()).equals("LINGO")) {
            if (s.equals("") || s == null) {
                continue;
            }
            System.out.println();
            r = s;
            last = new char[] { '.', '.', '.', '.', '.' };
            last[0] = r.charAt(0);
            System.out.println(last);
            time = 1;
            turn: while (!(s = read.readLine()).equals("")) {
                // check valid 
                if (s.length() != 5) {
                    System.out.println(last);
                    time++;
                    continue turn;
                }
                for (int i = 0; i < 5; i++) {
                    if (!Character.isUpperCase(s.charAt(i))) {
                        System.out.println(last);
                        time++;
                        continue turn;
                    }
                }
                // is right 
                if (s.equals(r)) {
                    System.out.println(r);
                    over(read);
                    continue game;
                }
                if (time == 6) {
                    System.out.println(r.toLowerCase());
                    over(read);
                    continue game;
                }
                // check 
                buff = new char[] { '.', '.', '.', '.', '.' };
                temp = new StringBuilder(r);
                used = new boolean[5];
                for (int i = 0; i < 5; i++) {
                    if (r.charAt(i) == s.charAt(i)) {
                        buff[i] = s.charAt(i);
                        temp.setCharAt(i, ' ');
                        used[i] = true;
                    }
                }
                for (int i = 0; i < 5; i++) {
                    if (used[i]) {
                        continue;
                    }
                    if ((pos = temp.indexOf(s.charAt(i) + "")) != -1) {
                        buff[i] = Character.toLowerCase(s.charAt(i));
                        temp.setCharAt(pos, ' ');
                        used[i] = true;
                    }
                }
                System.out.println(buff);
                last = buff;
                time++;
            }
            if (time < 7) {
                System.out.println(r.toLowerCase());
            }
        }
    }
    public static void over(BufferedReader read) throws IOException {
        while (!read.readLine().equals("")) {
        }
    }
}