蓝桥杯-卡片-Java

import java.util.*;
public class Main {
    public static void main(String[] args) {
        Map<Character,Integer> map=new HashMap<>();
        for(int j=1;j<5000;j++){
            String num=String.valueOf(j);
            char[] n=num.toCharArray();
            for (char c : n) {
                if (!map.containsKey(c)) {
                    map.put(c, 1);
                } else {
                    int count = map.get(c);
                    map.put(c, ++count);
                }
                System.out.println("1的个数："+map.get('1'));
            }
            if (map.get('1') == 2021) {
                System.out.println("拼到了 "+j);
                break;
            }
        }
    }
}