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

UL x=0,y=1,z=2,w=3;

UL generate(){
 UL t=(x^(x<<11));
 x=y; y=z; z=w;
 w=(w^(w>>19))^(t^(t>>8));
 return w;
}

int main() {
 cin>>x;
 priority_queue<UL> X;
 rep(i,5000001) X.push(generate());
 rep(i,5000000) X.push(generate()), X.pop();
 cout<<X.top()<<endl;
 return 0;
}