#include <stdio.h>


int main() {

    int num=0;
    int cnt;
    int now =1;

    scanf("%d",&num);

    for(cnt=0;now!=num;cnt++){
        if(now*2>num){
            cnt++;
            break;
        }
        now*=2;
    }

    printf("%d\n",cnt);

    return 0;
}