import java.util.*;
 
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
 
        int n = sc.nextInt();
        int[] arr = new int[n];
 
        for (int i = 0; i < n; i++) {
            arr[i] = sc.nextInt();
        }
 
        Map<Integer, Integer> freqMap = new HashMap<>();
 
        for (int num : arr) {
            freqMap.put(num, freqMap.getOrDefault(num, 0) + 1);
        }
 
        List<Integer> freqList = new ArrayList<>(freqMap.values());
        Collections.sort(freqList, Collections.reverseOrder());
 
        int steps = 0, cumulativeFreq = 0;
 
        for (int i = 0; i < freqList.size() - 1; i++) {
            cumulativeFreq += freqList.get(i);
            steps += cumulativeFreq;
        }
 
        System.out.println(steps);
        sc.close();
    }
}
 

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