#include <iostream>
#include <fstream>
#include <string>
#include <vector>

int main(void) {

	//std::ifstream inf("Text.txt");	std::cin.rdbuf(inf.rdbuf());
	int Y = 0;
	std::cin >> Y;
	std::cout << 2017 - Y << std::endl;

	return 0;
}