#include <stdio.h>
int main (){
    int n,i,m,z;
    scanf ("%d",&n);
    for (i=2;m!=1;i++){
        if (i==2){
            m=(n-(n%2))/2;
            z=m;
        }
        m=(z-(z%2))/2;
    }
    printf ("%d",i);
    return 0;
}