题解 | #删除重复字符#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        String s = in.next();
        System.out.println(slove(s));
    }
    public static StringBuffer slove(String s) {
        StringBuffer sb = new StringBuffer(s);
        char[] chr = s.toCharArray();
        for (int j = 1; j <= chr.length - 1; j++) {
            for (int i = 0; i < chr.length - j; i++) {
                if (chr[i] == chr[chr.length - j]) {
                    sb = sb.delete(chr.length - j, chr.length - j + 1);
                    break;
                }
            }
        }
        return sb;
    }
}