#include <iostream>
#include <algorithm>

using namespace std;

typedef long long int ll;



int main() {
    int n, count = 0;
    cin >> n;
    for (int i = 0; i < n; i++) {
        int c;
        cin >> c;
        if (c) count++;
    }

    cout << min(count, n - count);
    return 0;
}