#include <bits/stdc++.h>
#define rep(i,n)for(int i=0;i<(n);i++)
using namespace std;

uint32_t x = 0, y = 1, z = 2, w = 3;
uint32_t generate() { 
    uint32_t t = (x^(x<<11));
    x = y;
    y = z;
    z = w;
    w = (w ^ (w >> 19)) ^ (t ^ (t >> 8)); 
    return w;
}

int main(void) {
    int64_t seed; cin >> seed; 
    uint64_t l=0,r=UINT_MAX;
    while(r-l>1){
		uint64_t t=(l+r)/2;
		int cnt=0;
		x=seed;y=1;z=2;w=3;
		for(int i=0;i<10000001;i++){
			if(generate()<t)cnt++;
		}
		if(cnt<=10000001/2)l=t;
		else r=t;
	}
	cout<<l<<endl;
}