#include <bits/stdc++.h>
using namespace std;

using ll = long long;
using ull = unsigned long long;
using ld = long double;
template<class t> using vc = vector<t>;
template<class t> using vvc = vc<vc<t>>;
using pi = pair<int,int>;
using vi = vc<int>;
using vvi = vvc<int>;

#define rep(i,a,b) for (ll i = a; i < b; i++)
#define irep(i,a,b) for (int i = a; i > b; i--)
#define print(n) cout << n << '\n'
#define pritn(n) print(n)
#define rup(a,b) (a+b-1)/b
#define input(A,N) rep(i,0,N) cin>>A[i]
#define chmax(a,b) a = max(a,b)
#define chmin(a,b) a = min(a,b)

int main(){
    cout << fixed << setprecision(15);
    set<pair<ll,ll>> ans;
    ll now = 10000;
    ll X;
    cin >> X;
    ll x = X/2;
    vc<ll> l(X+1,0);
    rep(i,1,X+1){
        l[i] += i;
        ll ni = i;
        while(ni<=X){
            l[ni]--;
            ni += i;
        }
    }

    rep(i,1,x+1){
        ll j = X - i;
        ll a = l[i];
        ll b = l[j];
        if (now < abs(a-b)){
            continue;
        }else if (now>abs(a-b)){
            ans.clear();
            now  = abs(a-b);
        }
        ans.insert(pair<ll,ll>(i,j));
        if(i!=j){
            ans.insert(pair<ll,ll>(j,i));
        }
    }
    // auto g = [](pair<ll,ll> a,pair<ll,ll> b){return a<b;};
    // sort(ans.begin(),ans.end(),g);
    for (auto itr:ans){
        cout<<itr.first<<" "<<itr.second<<'\n';
    }

    //system("pause");
    return 0;
}