def tentotwo(x):
    x = int(x)
    list_two = []
    while x>0:
        temp = x%2
        list_two.append(temp)
        x = x//2
    return list_two
list_trans = tentotwo(int(input()))
count = 0 
for i in list_trans:
    if(i==1):
        count+=1
    else:
        continue
print(count)