#include <algorithm>
#include <array>
#include <iomanip>
#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include <cstdio>

#define FOR(i,n) for(int (i)=0;(i)<(int)(n);++(i))
#define FORR(i,l,n) for(int (i)=l;(i)<(int)(n);++(i))

int main() {
	int Y;
	std::cin >> Y;
	std::cout << 2017 - Y << std::endl;
	return 0;
}