题解 | #删除字符串中出现次数最少的字符#

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner fzhinput = new Scanner(System.in);
        String zfc = fzhinput.nextLine();
        fzhinput.close();
        StringBuilder stack = new StringBuilder();
        LinkedHashMap<Character,Integer> stackstore = new LinkedHashMap<>();
        for(char c : zfc.toCharArray()){
            stackstore.put(c, stackstore.getOrDefault(c,0)+1);
        }
        int minCount = Collections.min(stackstore.values());
        for(char c : zfc.toCharArray()){
            if(stackstore.get(c)>minCount){
                stack.append(c);
            }

        }
        System.out.println(stack);
    }
}