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

int tab[500007];

int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	int n; cin>>n;
	for(int i=0;i<n;i++){
		int x; cin>>x;
		tab[x]++;
	}
	multiset<int> vals;
	for(int i=0;i<500007;i++){
		if(tab[i]) vals.insert(tab[i]);
	}
	//for(auto i : vals) cout<<i<<" ";
	//cout<<endl;
	if(vals.size() == 1){
		cout<<1<<endl;
		return 0;
	}
	int cnt = 0;
	while(!vals.empty()){
		auto last = --vals.end();
		int maxi = *last;
		vals.erase(last);
		int tmp = maxi;
		maxi--;
		while(maxi){
			if(vals.empty()) break; //if no more to add
			auto first = vals.begin();
			int mini = *first;
			if(mini <= maxi){
				maxi -= mini;
				vals.erase(first);
				tmp += mini;
			}
			else{ // mini > maxi
				mini -= maxi;
				tmp += maxi;
				maxi = 0;
				vals.erase(first);
				vals.insert(mini);
			}
		}
		cnt++;
		//cout<<tmp<<endl;
	}
	cout<<cnt<<endl;
	return 0;
}