#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i = 0; i < (n);i++)
#define sz(x) int(x.size())
typedef long long ll;
typedef pair<int,int> P;
constexpr int INF = 1e9;
vector<long long> divisor(long long n){
    vector<long long> res;
    for(long long i = 1; i*i <= n; i++){
        if(n%i==0){
            res.push_back(i);
            if(n/i != i)res.push_back(n/i);
        }
    }
    return res;
}

int main(){
  int x;
  cin >> x;
  set<P> st;
  int mi = INF;

  for (int a = 1; a + a <= x; a++) {
    int b = x - a;  
    auto d1 = divisor(a);
    auto d2 = divisor(b);
    int f1 = a - d1.size(), f2 = b - d2.size();
    int v = abs(f1 - f2);

    if (v < mi) mi = v;
  }
  vector<P> res1, res2;
  for (int a = 1; a + a <= x; a++) {
    int b = x - a;  
    auto d1 = divisor(a);
    auto d2 = divisor(b);
    int f1 = a - d1.size(), f2 = b - d2.size();
    int v = abs(f1 - f2);

    if (v == mi) {
      res1.emplace_back(make_pair(a, b));
      res2.emplace_back(make_pair(b, a));
    }
  }
  reverse(res2.begin(), res2.end());
  for (auto e : res1) {
    printf("%d %d\n", e.first, e.second);
  }
  for (auto e : res2) {
    printf("%d %d\n", e.first, e.second);
  }

  return 0;
}