#include <cstdio> #include <cstring> #include <iostream> #include <string> #include <cmath> #include <bitset> #include <vector> #include <map> #include <set> #include <queue> #include <deque> #include <algorithm> #include <complex> #include <unordered_map> #include <unordered_set> #include <random> #include <cassert> #include <fstream> #include <utility> #include <functional> #include <stack> #define popcount __builtin_popcount using namespace std; typedef long long int ll; typedef pair<int, int> P; int main() { ll n; cin>>n; for(int i=59; i>=0; i--){ if(n&(1ll<<i)){ cout<<(1ll<<i)<<endl; return 0; } } return 0; }