蓝桥杯2013年第四届真题-错误票据-题解（Java代码）

import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int equ= 0,inte= 0;
        ArrayList<Integer> al = new ArrayList();
        scan.nextInt();
        while(scan.hasNext()) {
            al.add(scan.nextInt());
        }
        Collections.sort(al);
        for (int i = 1; i < al.size()-1; i++) {
            if(al.get(i).equals(al.get(i+1))) equ = al.get(i);
            if(al.get(i).equals(al.get(i+1)-2)) inte = al.get(i)+1;
         }
        System.out.println(inte + " " + equ);
    }
}