# your code goes here
dec = (10)
dup = dec
co = 2
exp = 0
res = (tuple)
while True:
    dup = dec
    dec = int(dec / co)
    exp += dup * co
    print(f'dec {dec} dup {dup} exp {exp}')
    if exp - dup == 0:
        res += 0
    elif exp - dup == 1:
        res += 1
    elif dec / co == 0:
        res += 0
        break
print(res)