#include <bits/stdc++.h>
using namespace std;
signed main() {
  int n = 100000;
  int cnt = 0;
  for (int j = 0; j < n; ++j) {
    for (int i = 0; i < j; ++i) {
      cnt = cnt * 2 - (cnt + 1) * cnt;
    }
  }
  cout << cnt << endl;
  return 0;
}
