#include <iostream>

int BitOneCount(unsigned long val)
{
    unsigned long mask = 0x80000000;
    int ret = 0;
    for(int i = 0; i < 32; i++)
    {
        if(val & mask)
            ret++;
        
        mask >>= 1;
    }
    
    return ret;
}

int main()
{
    unsigned int n;
    std::cin >> n;
    
    unsigned mask = 0x80000000;
    while(!(n & mask))
        mask >>=1;
    

    int ans = (BitOneCount(n) == 1)? 0:1;
    for(; mask != 1; mask >>= 1)
        ans++;
    
    std::cout << ans << std::endl;
    
    return 0;
}