Move Project Euler under puzzles.

puzzles/project_euler/p016_PowerDigitSum.py

@@ -0,0 +1,21 @@
+#Power digit sum
+#Problem 16
+#
+#215 = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26.
+#
+#What is the sum of the digits of the number 21000?
+
+
+pp = 1000
+
+c = [0 for i in range(0, pp//3+1)]
+c[0] = 1
+
+for i in range(0,pp):
+    r = 0
+    for j in range(0,len(c)):
+        p = c[j]*2+r
+        r = p//10
+        c[j] = p%10
+
+print( sum(c) )