#define _CRT_SECURE_NO_WARNINGS

#include <algorithm>
#include <iostream>
#include <set>
#include <string>
#include <vector>




using namespace std;

typedef long long int ll;

#define REP(i,n) for(int i=0; i<n; ++i )
#define REPR(i,n) for(int i=n; i>=0; --i)
#define FOR(i,a,n) for(int i=a; i<n; ++i )
#define FORR(i,a,n) for(int i=n; i>=a; --i)

#define VDOUT(x) cerr << #x << "\n";for(auto i : x ) cerr << "  " << i << "\n";
#define DOUT(x) cerr << #x << " = " << x << "\n";

#define COUT(x) cout << x << "\n";
#define COUT2(x,y) cout <<x << " " << y << "\n";
#define COUT3(x,y,z) cout << x << " " << y << " " << z << "\n"; 

#define INI ios::sync_with_stdio(false);cin.tie(0)


#define ALL(x) x.begin(),x.end()


signed main()
{
	INI;
	int n;
	cin >> n;

	COUT(2017 - n);
	return 0;
}