basic-mod2

basic_mod2/message.txt

@@ -0,0 +1 @@
+432 331 192 108 180 50 231 188 105 51 364 168 344 195 297 342 292 198 448 62 236 342 63 

basic_mod2/sol.py

@@ -0,0 +1,20 @@
+#!/home/maxime/.pyvenv/bin/python3
+
+with open("message.txt", 'r') as f:
+    text = f.read().strip()
+
+    cipher = text.split(' ')
+
+    dec = ""
+    for i in cipher:
+        i = int(i)
+        i %= 41
+        i = pow(i, -1, 41)
+        if i <= 26:
+            dec += chr(ord('a') + i - 1)
+        elif i <= 36:
+            dec += chr(ord('0') + i - 27)
+        elif i == 37:
+            dec += '_'
+    print(dec)
+