import java.util.Scanner;
import java.util.Arrays;
import java.util.stream.IntStream;
 
public class Ar2 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] votes = new int[sc.nextInt()];
        Arrays.fill(votes, 0);
        int M = sc.nextInt();
        for (int i = 0; i < M; i++) {
            votes[sc.nextInt()] += 1;
        }
        int maxVotes = Arrays.stream(votes).max().getAsInt();
        int candidate = 0;
        for (int maxCandidate : votes) {
            if (maxVotes == maxCandidate) {
                System.out.println(candidate);
            }
            candidate++;
        }
    }
}
 

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