#include<bits/stdc++.h>
using namespace std;
using UL = unsigned int;
using LL = long long;
using ULL = unsigned long long;
#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;
}

UL G[5000002]; UL p=0;

void push(UL v){
 G[p++]=v;
 UL i=p-1;
 while(i!=0){
  UL to=(i-1)/2;
  if(G[to]>=G[i]) return;
  swap(G[to],G[i]);
  i=to;
 }
}
UL top(){ return G[0]; }
void pop(){
 swap(G[0],G[--p]);
 int i=0;
 while(true){
  UL to1=i*2+1,to2=i*2+2;
  UL to=p;
  if(to2<p){
   if(G[i]<max(G[to1],G[to2]))
    to=(G[to1]>G[to2])?to1:to2;
  }
  else if(to1<p){
   if(G[i]<G[to1]) to=to1;
  }
  if(to==p) return;
  swap(G[i],G[to]);
  i=to;
 }
}

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