#include<cstdio>
#include <iostream>
#include<algorithm>
#include<string>
#include<queue>
#include<vector>
#include<functional>
#include<cmath>
#include<map>
#include<stack>
#include<set>
#include<numeric>

using namespace std;
typedef long long ll;
typedef pair<int, int> Pr;

int N;
int a[17];
queue<int> q;

int main()
{
	int Y;
	cin >> Y;

	cout << 2017 - Y << endl;
	return	0;
}