"""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."""

tot=0
x=0
while(x<1000):
  if(x%3==0 or x%5==0):
    tot=tot+x
  x+=1
print(tot)
