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#include<bits/stdc++.h>
using namespace std;

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n;
    cin>>n;
    int a;
    vector<int> z(n, 0);

    for(int i = 0; i < n; i++){
        cin>>a;
        a--;

        z[a]++;
    }

    sort(z.begin(), z.end());
    reverse(z.begin(), z.end());

    int o = 1;

    int l = 0, r = n-1;

    while(l < r){
        if(z[l] > z[r]){
            z[l] -= z[r];
            r--;
        }
        else{
            z[r] -= z[l]-1;
            l++;
            o++;
        }
    }

    cout<<o<<"\n";
}