#include <bits/stdc++.h>
using namespace std;
 
int minSteps(vector<int> arr){
 
	map<int, int> freq;
	for (int i : arr){
		freq[i]++;
	}
 
	vector<pair<int, int>> a;
 
	for (auto i : freq){
		a.push_back({i.first, i.second});
	}
 
	int n = a.size();
	int steps = 0;
	for (int i = n-1; i >= 1; i--){
		a[i-1].second += a[i].second;
		steps += a[i].second;
		a[i].second = 0;
	}
 
	return steps;
}
 
int main() {
	// your code goes here
	int n; cin >> n;
	vector<int> arr(n);
 
	for (int &i : arr){
		cin >> i;
	}
	cout << minSteps(arr);
	return 0;
}

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