rail-fence

rail_fence/message.txt

@@ -0,0 +1 @@
+Ta _7N6DDDhlg:W3D_H3C31N__0D3ef sHR053F38N43D0F i33___NA

rail_fence/sol.py

@@ -0,0 +1,47 @@
+#!/home/maxime/.pyvenv/bin/python3
+
+with open("message.txt", 'r') as f:
+    text = f.read()
+
+    dec = [" "] * len(text)
+    i = 0
+    j = 0
+    while True:
+        dec[j] = text[i]
+        i += 1
+        j += 6
+        if j >= len(text):
+            break
+    j = 1
+    while True:
+        dec[j] = text[i]
+        i += 1
+        j += 4 
+        if j >= len(text):
+            break
+        dec[j] = text[i]
+        i += 1
+        j += 2
+        if j >= len(text):
+            break
+    j = 2
+    while True:
+        dec[j] = text[i]
+        i += 1
+        j += 2
+        if j >= len(text):
+            break
+        dec[j] = text[i]
+        i += 1
+        j += 4
+        if j >= len(text):
+            break
+    j = 3
+    while True:
+        dec[j] = text[i]
+        i += 1
+        j += 6
+        if j >= len(text):
+            break
+    print(''.join(dec))
+