class HelloWorld {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int n = in.nextInt();
int c = 0;
int res = 0;
//移位等于1累加 遇到0 置零
while (n!=0) {
if ((n & 1) == 1) {
c++;
} else {
c=0;
}
res = Math.max(res,c);
n>>=1;
}
System.out.println(res);
}
}