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#include<bits/stdc++.h>
#define TEM template
#define NOEX noexcept
using namespace std;
int main() {
	int n;
	cin >> n;
	int l = sqrt(n);
	for (int i = 2; i <= l; i++) {
		if (n % i == 0) {
			cout << n / i;
			break;
		}
	}
	return 0;
}