n = int(input("Podaj liczbe n: ")) b=1 p = n%2 n = n//2 while(n>0): c = n%2 if(c!=p):

n = int(input("Podaj liczbe n: "))

b=1
p = n%2
n = n//2
while(n>0):
    c = n%2
    if(c!=p):
        b=b+1
    p=c
    n=n//2
print(b)