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


int main() {
#ifndef ONLINE_JUDGE
	freopen("input.txt", "r", stdin);
	freopen("output.txt", "w", stdout);
#endif
	long long n;
	cin >> n;
	while (n < 0)
		n += 1000000007;
	cout << n % (1000000007);
}