题解 | #字符串加密#

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader;

public class Main {

public static void main(String[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String key;
    while ((key = br.readLine()) != null) {
        char[] chars = key.toLowerCase().toCharArray();
        char[] dict = new char[26];
        int index = 0;
        tag1:
        for (char ch : chars) {
            for (int i = 0; i < index; i++) {
                if (ch == dict[i]) {
                    continue tag1;
                }
            }
            dict[index] = ch;
            index++;
        }

        char ch = 'a';
        tag2:
        for (int i = 0; i < 26; i++) {
            for (int j = 0; j < index; j++) {
                if (dict[j] == ch) {
                    ch++;
                    continue tag2;
                }
            }
            dict[index] = ch;
            ch++;
            index++;
        }

        String str = br.readLine();
        char[] res = str.toCharArray();
        for (int i = 0; i < res.length; i++) {
            if(res[i] - 'a'>=0){
                res[i] = dict[res[i] - 'a'];
            }else{
                res[i] = dict[res[i] - 'A'];
            }
            
        }

        System.out.println(String.valueOf(res));
    }
}

}