import java.util.*;

public class Main {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int count = 0;
    int ans = 1;

    for(int i=1; i<N+1; i++) {
      int challengeNum = i;
      int challengeCount = 0;
      while(challengeNum % 2 == 0){
        challengeCount++;
        challengeNum /= 2;
      }
      if(count < challengeCount) {
        count = challengeCount;
        ans = i;
      }
    }

    System.out.println(ans);
  }
} import java.util.*; util.* java public class Main {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int count = 0;
    int ans = 1;

    for(int i=1; i<N+1; i++) {
      int challengeNum = i;
      int challengeCount = 0;
      while(challengeNum % 2 == 0){
        challengeCount++;
        challengeNum /= 2;
      }
      if(count < challengeCount) {
        count = challengeCount;
        ans = i;
      }
    }

    System.out.println(ans);
  }
} Main public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int count = 0;
    int ans = 1;

    for(int i=1; i<N+1; i++) {
      int challengeNum = i;
      int challengeCount = 0;
      while(challengeNum % 2 == 0){
        challengeCount++;
        challengeNum /= 2;
      }
      if(count < challengeCount) {
        count = challengeCount;
        ans = i;
      }
    }

    System.out.println(ans);
  } main {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int count = 0;
    int ans = 1;

    for(int i=1; i<N+1; i++) {
      int challengeNum = i;
      int challengeCount = 0;
      while(challengeNum % 2 == 0){
        challengeCount++;
        challengeNum /= 2;
      }
      if(count < challengeCount) {
        count = challengeCount;
        ans = i;
      }
    }

    System.out.println(ans);
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc int count = 0; count 0 int ans = 1; ans 1 for(int i=1; i<N+1; i++) {
      int challengeNum = i;
      int challengeCount = 0;
      while(challengeNum % 2 == 0){
        challengeCount++;
        challengeNum /= 2;
      }
      if(count < challengeCount) {
        count = challengeCount;
        ans = i;
      }
    } int i=1; int i=1; i 1 i<N+1 i N+1 N 1 i++ i++ i {
      int challengeNum = i;
      int challengeCount = 0;
      while(challengeNum % 2 == 0){
        challengeCount++;
        challengeNum /= 2;
      }
      if(count < challengeCount) {
        count = challengeCount;
        ans = i;
      }
    } {
      int challengeNum = i;
      int challengeCount = 0;
      while(challengeNum % 2 == 0){
        challengeCount++;
        challengeNum /= 2;
      }
      if(count < challengeCount) {
        count = challengeCount;
        ans = i;
      }
    } int challengeNum = i; challengeNum i int challengeCount = 0; challengeCount 0 while(challengeNum % 2 == 0){
        challengeCount++;
        challengeNum /= 2;
      } challengeNum % 2 == 0 challengeNum % 2 challengeNum 2 0 {
        challengeCount++;
        challengeNum /= 2;
      } challengeCount++ challengeCount challengeNum /= 2 challengeNum 2 if(count < challengeCount) {
        count = challengeCount;
        ans = i;
      } count < challengeCount count challengeCount {
        count = challengeCount;
        ans = i;
      } count = challengeCount count challengeCount ans = i ans i System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int count = 0;
    int ans = 1;

    for(int i=1; i<N+1; i++) {
      int challengeNum = i;
      int challengeCount = 0;
      while(challengeNum % 2 == 0){
        challengeCount++;
        challengeNum /= 2;
      }
      if(count < challengeCount) {
        count = challengeCount;
        ans = i;
      }
    }

    System.out.println(ans);
  }
} public class Main {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int count = 0;
    int ans = 1;

    for(int i=1; i<N+1; i++) {
      int challengeNum = i;
      int challengeCount = 0;
      while(challengeNum % 2 == 0){
        challengeCount++;
        challengeNum /= 2;
      }
      if(count < challengeCount) {
        count = challengeCount;
        ans = i;
      }
    }

    System.out.println(ans);
  }
} Main
import java.util.*;

public class Main {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int count = 0;
    int ans = 1;

    for(int i=1; i<N+1; i++) {
      int challengeNum = i;
      int challengeCount = 0;
      while(challengeNum % 2 == 0){
        challengeCount++;
        challengeNum /= 2;
      }
      if(count < challengeCount) {
        count = challengeCount;
        ans = i;
      }
    }

    System.out.println(ans);
  }
}
