20/01/20 15:41:16.18 /G9h8LiI.net
>>651 Ruby
def si(n,m); n.step(m,n).inject(:+); end
p n3 = si( 3, 1000 ) #=> 166833
p n5 = si( 5, 1000 ) #=> 100500
p n15 = si( 15, 1000 ) #=> 33165
p n3 + n5 - 2 * n15 #=> 201003
20/01/20 15:41:16.18 /G9h8LiI.net
>>651 Ruby
def si(n,m); n.step(m,n).inject(:+); end
p n3 = si( 3, 1000 ) #=> 166833
p n5 = si( 5, 1000 ) #=> 100500
p n15 = si( 15, 1000 ) #=> 33165
p n3 + n5 - 2 * n15 #=> 201003