import sys; input = sys.stdin.buffer.readline
sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	N = int(input())
	skill = 2 * N
	val = 0
	cnt = N
	while True:
		val += cnt
		cnt = int(cnt // 2)
		if cnt == 0:
			break

	print(skill - val)





if __name__ == '__main__':
	main()