Initial commit

Changes to be committed:
	new file:   problem_1.py
        new file:   problem_2.py
	new file:   problem_3.py

problem_1.py

@@ -0,0 +1,13 @@
+import math
+
+
+sum = 0
+
+
+for x in range(0, 1000):
+    if x % 3 == 0:
+        sum += x
+    elif x % 5 == 0:
+        sum += x
+
+print(sum)