Create sol5.py (TheAlgorithms#425)

added a solve for the problem

Author: alpylmz

Project Euler/Problem 01/sol5.py

@@ -0,0 +1,8 @@
+a=3
+result=0
+while a=<1000:
+  if(a%3==0 and a%5==0):
+    result+=a
+  elif(a%15==0):
+    result-=a
+print(result)