From b5e1c0facca17f7130a232a459321a54679318b7 Mon Sep 17 00:00:00 2001
From: Seongbeom Park <sparkamita90@gmail.com>
Date: Sat, 19 Feb 2022 14:43:08 +0900
Subject: [PATCH] decrypt message

---
 README.md  |  3 +++
 decrypt.py | 12 ++++++++++++
 2 files changed, 15 insertions(+)
 create mode 100644 decrypt.py

diff --git a/README.md b/README.md
index 14b3716..7576440 100644
--- a/README.md
+++ b/README.md
@@ -27,3 +27,6 @@
 ### expanding-nebula
 * Completed in: 6 hrs, 49 mins, 26 secs.
 * DP & time complexity optimization
+
+## Encrypted message
+CFcSBwgCCBoHRhkKU1cGAA4AGU5YQR5THBwNFwoGGAxTQQMQVBUSBg4EAAwQRhUQVBUHFAQTGRpT QQMQVBkPERkECQAWDVwXX1BGEwgJBAwCBFRVHQRGUlFBShwaDVZTGBUFVUdBShsVA1tZBwNGUlFB ShoVB1wXX1BGFAQOSklOQR5HGh5AVRY=
diff --git a/decrypt.py b/decrypt.py
new file mode 100644
index 0000000..a74c125
--- /dev/null
+++ b/decrypt.py
@@ -0,0 +1,12 @@
+import sys
+if len(sys.argv) != 3:
+    print "Usage: python "+sys.argv[0]+" <encrypted_message> <user_name>"
+    exit(1)
+encrypted_message = sys.argv[1]
+user_name = sys.argv[2]
+
+import base64
+result = []
+for i, c in enumerate(base64.b64decode(encrypted_message)):
+    result.append(chr(ord(c) ^ ord(user_name[i % len(user_name)])))
+print ''.join(result)