#include <iostream>
#include <map>
#include <string>
#include <vector>
#include <cmath>

int main(int argc, char *argv[]) {
	int bisket_num = 0;
	std::cin >> bisket_num;

	uint32_t result = 0;
	for (int clap_num = 0; clap_num <= 32; clap_num++) {
		uint64_t powered_num = std::pow(2, clap_num);
		if (bisket_num > powered_num) {
			continue;
		}
		if (bisket_num == powered_num) {
			result = clap_num;
			break;
		}
		if (bisket_num < powered_num) {
			clap_num--;
			uint64_t base_num = std::pow(2, clap_num);
			uint64_t sub = bisket_num - base_num;
			if (sub % 2 == 0 || sub == 1) {
				result = clap_num + 1;
			} else {
				result = clap_num + 2;
			}	
			break;		
		}
	}

	std::cout << result << std::endl;

	return 0;
}