import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int n = in.nextInt();
int cnt = 0;
int max = 0;
while(n>0){
if((n & 1) == 1){
cnt++;
max = Math.max(max,cnt);
}else{
cnt = 0;
}
n >>>= 1;
}
System.out.print(max);
}
}