sum = 0num = 1
while num <= 210:sum += numnum *= 2
print(sum) # Выводит 409 (1 + 2 + 4 + 8 + 16 + 32 + 64 + 128 + 256 = 409)
sum = 0
num = 1
while num <= 210:
sum += num
num *= 2
print(sum) # Выводит 409 (1 + 2 + 4 + 8 + 16 + 32 + 64 + 128 + 256 = 409)