#include "bits/stdc++.h"

using namespace std;
using ll = long long;
using IP = pair<int, int>;


#define INF 999999999
#define atcoder(int)1e9+7
#define Endl endl

int main() {

	int Y;
	cin >> Y;

	cout << 2017 - Y << endl;

	return 0;
}