#define _USE_MATH_DEFINES
#include<iostream>
#include <math.h>
#include <climits>
#include <algorithm>
#include <vector>
#include <queue>
#include <string>
using namespace std;

/* sample input

*/
int y;

int main()
{

	cin >> y;
	cout << 2017 - y << endl;
	return 0;
}