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 numBirds = in.nextInt();
        int[] types = new int[numBirds];
        for(int types_i=0; types_i < numBirds; types_i++){
            types[types_i] = in.nextInt();
        }
        // your code goes here
        int[] counts = new int[5];
        
        // iterate through the birds
        for(int i = 0; i < numBirds; i++) {
            int bird = types[i];
            counts[bird-1] += 1;
        }
        
        int most = 0;
        for(int i = 0; i < 5; i++) {
            //System.out.println(most);
            if(most < counts[i] + 1) {
                //System.out.println(most);
                most = counts[i] + 1;
            }
        }
        System.out.println(most);
    }
}