#include<iostream>
#include<algorithm>
#include<vector>
#include<string>
#include<utility>
#include<map>
#include<set>
#include<queue>
#include<stack>
#include<functional>
#include<math.h>
using namespace std;
#define N (1000000000+7)
//#define N (998244353)
#define INF 1e16
typedef long long ll;
typedef pair<ll,ll> P;
typedef vector<ll> vec;
typedef vector<vec> mat;

const int inf = 1e9;

ll dp[1000010][4];


int main(void){
    int Y;
    cin>>Y;
    cout<<2017-Y<<endl;
}