#include <bits/stdc++.h> using namespace std; int main(){ int a; cin>>a; cout<<(a10241024)/4<<endl; }

#include<iostream> using namespace std;int main(){int n;cin>>n;n*=262144;cout<<n;}

#include<iostream> using namespace std; int main(){ long long n; cin >> n; n = n * 1024 * 1024 / 4; cout << n; return 0; }

快，准，狠

#include<iostream> using namespace std; int main(){ int a; cin>>a; cout<<a10241024/4; return 0; }