Add some stuffs

python/foobar/three/hash_someone_else.py

@@ -0,0 +1,19 @@
+def step(digest,prev_m):
+    k = 0
+    while True:
+        rem = ((digest ^ prev_m) + k * 256) % 129
+        if rem == 0:
+            return ((digest ^ prev_m) + k * 256) / 129
+        else:
+            k = k + 1
+
+def answer(digest):
+    prev = 0
+    message = []
+    for index, num in enumerate(digest):
+        if index == 0:
+            message.append(step(num,0))
+        else:
+            message.append(step(num,message[-1]))
+
+    return message