import java.util.Scanner;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
while (sc.hasNextInt()) {
int a = sc.nextInt();
String str = Integer.toBinaryString(a);
// System.out.println(str);
String[] str1 = str.split("0");
// System.out.println(str1.length);
int max = 0;
for (int i = 0; i < str1.length; i++) {
max = Math.max(max, str1[i].length());
// System.out.println(str1[i]);
}
System.out.println(max);
}
}
}