#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using Graph = vector<vector<int>>;
int main() {
  long long N; cin >> N;
  if(1 == N) {
    cout << N << endl;
    return 0;
  }
  if(N % 2 == 0) {
    cout << N/2 << endl;
  }else {
    cout << 1 << endl;
  }
  
}