#include <map>
#include <set>
#include <list>
#include <cmath>
#include <ctime>
#include <deque>
#include <queue>
#include <stack>
#include <string>
#include <bitset>
#include <cstdio>
#include <limits>
#include <vector>
#include <climits>
#include <cstring>
#include <cstdlib>
#include <fstream>
#include <numeric>
#include <sstream>
#include <iostream>
#include <algorithm>
#include <unordered_map>

using namespace std;


int main(){
    int n,max;
    cin >> n;
    int c[n];
    vector<int> height(n);
    for(int height_i = 0;height_i < n;height_i++){
       cin >> height[height_i];
    }
    for(int height_i = 0;height_i < n;height_i++)
        {
       c[height[height_i]]++;
    }
     for(int height_i = 0;height_i < n-1;height_i++)   
         {
         if(c[height_i]>c[height_i+1])
            max=c[height_i]; 
         else
             max=c[height_i+1];
     }
    cout<<max;
    return 0;
}