commit ae41caa19d1d5bcf7a263a414263a769c58dc568
Author: Dece <shgck@pistache.land>
Date:   Sun Dec 29 02:48:59 2019 +0100

    Problem 1

diff --git a/problem1.py b/problem1.py
new file mode 100644
index 0000000..29b8126
--- /dev/null
+++ b/problem1.py
@@ -0,0 +1,5 @@
+"""Multiples of 3 and 5."""
+
+mult3 = set(i for i in range(1000) if i % 3 == 0)
+mult5 = set(i for i in range(1000) if i % 5 == 0)
+print(sum(mult3 | mult5))