import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int[] a = new int[n];
        for(int a_i=0; a_i < n; a_i++){
            a[a_i] = in.nextInt();
        }
        
        for(int i = 0; i < n; i++) {
            for(int j = i+1; j < n; j++) {
                if(a[i]-a[j] <= 1) {
                    
                }
            }
        }
    }
}