diff --git a/DZ1/.DS_Store b/DZ1/.DS_Store
new file mode 100644
index 0000000..5008ddf
Binary files /dev/null and b/DZ1/.DS_Store differ
diff --git a/DZ1/task1.py b/DZ1/task1.py
new file mode 100644
index 0000000..9835542
--- /dev/null
+++ b/DZ1/task1.py
@@ -0,0 +1,3 @@
+numbers = input().split()
+print(sum(([float(number) for number in numbers])))
+
diff --git a/DZ1/task2.py b/DZ1/task2.py
new file mode 100644
index 0000000..0f54d57
--- /dev/null
+++ b/DZ1/task2.py
@@ -0,0 +1,5 @@
+text = input()
+while True:
+    rule = input()
+    array = rule.split('->')
+    print(text.replace(array[0],array[1]))
diff --git a/DZ1/task3.py b/DZ1/task3.py
new file mode 100644
index 0000000..a7fa481
--- /dev/null
+++ b/DZ1/task3.py
@@ -0,0 +1,3 @@
+numbers = input().split()
+list = [int(abs(float(number))) for number in numbers]
+print(list)
diff --git a/DZ1/task4.py b/DZ1/task4.py
new file mode 100644
index 0000000..de00499
--- /dev/null
+++ b/DZ1/task4.py
@@ -0,0 +1,7 @@
+numbers = input().split()
+res = list(map(float,numbers))
+sum = 0
+for number in res:
+    sum += number ** 2
+print(sum)
+
diff --git a/DZ1/task5.py b/DZ1/task5.py
new file mode 100644
index 0000000..f1f4eb2
--- /dev/null
+++ b/DZ1/task5.py
@@ -0,0 +1,7 @@
+text = input().replace(' ','')
+shift = int(input())
+result = ''
+97 - 122
+for letter in text:
+    result += chr((ord(letter)+(shift % 26)) % 122)
+print(result)
diff --git a/archive.py b/archive.py
new file mode 100644
index 0000000..ca77d01
--- /dev/null
+++ b/archive.py
@@ -0,0 +1,33 @@
+import math
+import sys
+
+if not (2 <= len(sys.argv) <= 3):
+    print('Usage: python', sys.argv[0], 'input_file')
+    exit(-1)
+
+with open(sys.argv[1],'rb') as file:
+    data = file.read()
+
+outpath = sys.argv[2] if len(sys.argv) == 3 else sys.argv[1] + '.unlzw'
+dictionary = {i: (i,) for i in range(256)}
+sequence = list()
+i = 0
+with open(outpath, 'wb') as file:
+    while i < len(data):
+        if len(sequence) == 0:
+            n = len(dictionary)
+        else:
+            n = len(dictionary) + 1
+        bits = math.ceil(math.log2(n))
+        bytes = math.ceil(bits / 8)
+        slice = data[i:i + bytes]
+        index = int.from_bytes(slice, 'little')
+        if index == len(dictionary):
+            new_sequence = sequence + sequence[-1:]
+        else:
+            new_sequence = list(dictionary[index])
+        file.write(bytearray(new_sequence))
+        dictionary[len(dictionary)] = tuple(sequence + new_sequence[-1:])
+        i += bytes
+        sequence = new_sequence
+