#If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.
#Find the sum of all the multiples of 3 or 5 below 1000.


sum = 0

for counter in range(0, 1000):
    if counter % 3 == 0 or counter % 5 == 0:
        sum += counter

print(sum)
