#include <iostream>
#include <map>
using namespace std;
unsigned int x = 0, y = 1, z = 2, w = 3;
unsigned int  generate() { 
    unsigned int  t = (x^(x<<11));
    x = y;
    y = z;
    z = w;
    w = (w ^ (w >> 19)) ^ (t ^ (t >> 8)); 
    return w;
}

int main(int argc, char* argv[])
{
    long long seed; 
	cin >> seed; 
    x = seed;
	const int MAX=10000001;
	multimap<unsigned int ,int> myMap;
    for (int i = 0; i < MAX; i++) {
		myMap.insert(multimap<unsigned int ,int>::value_type(generate(),1));
    }
	multimap<unsigned int ,int>::iterator mit;
	int N=MAX/2;
	for (mit=myMap.begin();mit!=myMap.end();mit++){
		N--;
		if (N==0){
			break;
		}
	}
	cout<<(*mit).first<<endl;
	return 0;
}