#include <stdio.h>
#include <stdlib.h>

int main()
{
    int n,i;
    int keta;
    int sum = 0;

    scanf("%d", &n);

    for (i =0; i < 32; i++) {
        if (n & 1 == 1)  sum++;
        n = n >> 1;
        if (n == 0) break;
    }

    if (sum == 1) printf("%d\n", i);
    else            printf("%d\n",i+1);
    return 0;
}