#include<bits/stdc++.h>
using namespace std;
#define F first
#define S second
#define EB emplace_back
#define MP make_pair
#define all(o) (o).begin(), (o).end()
#define mset(m,v) memset(m,v,sizeof(m))
#define fr(i,n) for(lli i=0;i<n;++i)
#define rep(i,a,b) for(lli i=a;i<=b;++i)
#define remin(a,b) (a=min((a),(b)))
#define remax(a,b) (a=max((a),(b))) 
#define endl '\n'
typedef long long int lli;    typedef long double ld;
typedef pair< lli,lli > ii;   typedef vector<lli> vi;
typedef vector<ii> vii;       typedef vector<vi> graph;
lli MOD=1000000007;           long double EPS=1e-9;
#define debarr(a,n) cout<<#a<<" : ";for(int i=0;i<n;i++) cerr<<a[i]<<" "; cerr<<endl;
#define debmat(mat,row,col) cout<<#mat<<" :\n";for(int i=0;i<row;i++) {for(int j=0;j<col;j++) cerr<<mat[i][j]<<" ";cerr<<endl;}
#define pr(...) dbs(#__VA_ARGS__, __VA_ARGS__)
template <class S, class T>ostream& operator <<(ostream& os, const pair<S, T>& p) {return os << "(" << p.first << ", " << p.second << ")";}
template <class T>ostream& operator <<(ostream& os, const vector<T>& p) {os << "[ "; for (auto& it : p) os << it << " "; return os << "]";}
template <class T>ostream& operator <<(ostream& os, const unordered_set<T>& p) {os << "[ "; for (auto& it : p) os << it << " "; return os << "]";}
template <class S, class T>ostream& operator <<(ostream& os, const unordered_map<S, T>& p) {os << "[ "; for (auto& it : p) os << it << " "; return os << "]";}
template <class T>ostream& operator <<(ostream& os, const set<T>& p) {os << "[ "; for (auto& it : p) os << it << " "; return os << "]";}
template <class T>ostream& operator <<(ostream& os, const multiset<T>& p) {os << "[ "; for (auto& it : p) os << it << " "; return os << "]";}
template <class S, class T>ostream& operator <<(ostream& os, const map<S, T>& p) {os << "[ "; for (auto& it : p) os << it << " "; return os << "]";}
template <class T> void dbs(string str, T t) {cerr << str << " : " << t << "\n";}
template <class T, class... S> void dbs(string str, T t, S... s) {int idx = str.find(','); cerr << str.substr(0, idx) << " : " << t << ","; dbs(str.substr(idx + 1), s...);}
template <class T> void prc(T a, T b) {cerr << "["; for (T i = a; i != b; ++i) {if (i != a) cerr << ", "; cerr << *i;} cerr << "]\n";}
lli binpow(lli b,lli p,lli mod){lli ans=1;for(;p;p>>=1){if(p&1)ans=ans*b%mod;b=b*b%mod;}return ans;}


void pre(){

}

void solve(){
	lli n;
	cin>>n;
	int arr[n];
	map<int,int> mpodd,mpeven;
	fr(i,n){
		cin>>arr[i];
		if(i&1)mpeven[arr[i]]++;
		else mpodd[arr[i]]++;
	}
	lli ans=n;
	lli val;
	vii odd(all(mpodd)),even(all(mpeven));
	for(auto &v:odd){
		swap(v.F,v.S);
	}
	for(auto &v:even){
		swap(v.F,v.S);
	}
	sort(all(odd));sort(all(even));
	auto it1=odd.end();it1--;
	auto it3=even.end();it3--;
	if((*it1).S!=(*it3).S){
		cout<<ans-(*it3).F-(*it1).F<<endl;return;
	}
	else{
		lli val1=n-(*it1).F;
		lli val2=n-(*it3).F;
		if(it1!=odd.begin()){auto it2=it1;it2--;val2-=(*it2).F;}
		if(it3!=even.begin()){auto it4=it3;it4--;val1-=(*it4).F;}
		cout<<min(val1,val2)<<endl;
	}
	
}

int main(){
	ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
	//freopen("in.txt","r",stdin);
	//freopen("out.txt","w",stdout);
	pre();
	int t=1;
	//cin>>t;
	for(int i=1;i<=t;i++){
		//cout<<"Case #"<<i<<": ";
		solve();
	}
}

Measured memory_bytes: 6912