//No.99 ジャンピング駒
#pragma GCC optimize("O3")
#pragma GCC target("avx")
#include <bits/stdc++.h>
#define rep(i ,n) for(int i=0;i<(int)(n);++i)

using namespace std;

signed main(){
    int n; cin >>n;
    vector<long long> x(n);
    rep( i , n ) cin >> x[i];
    int odd , even; 
    odd = even = 0;
    rep( i , n ){
        if( n & 1) ++odd;
        else ++even;
    }
    cout << min( odd , even ) << endl;
}