AC

Check_Odd_Even.py

@@ -0,0 +1,10 @@
+# -------------------------------------
+# create by: Nguyen Tien Dung         -
+# Date: 10:11 PM 30/8/2021             -
+# ------------------------------------
+
+numbe = int(input())
+if numbe % 2 == 0:
+    print("CHAN")
+else :
+    print("LE")

Decode.py

@@ -0,0 +1,17 @@
+# -------------------------------------
+# create by: Nguyen Tien Dung         -
+# Date: 11:23 PM 30/8/2021            -
+# -------------------------------------
+#hehelo bebe
+T = int(input())
+while T>0:
+    str = input()
+    for index in range(len(str)):
+        if index % 2 == 1:
+            k = int(str[index])
+            # print(str[index])
+            while k > 0:
+                print(str[index-1],end="")
+                k = k-1
+    T = T-1
+    print("\n")