diff --git a/lesson_1/Pyton file.pyi b/lesson_1/Pyton file.pyi
new file mode 100644
index 0000000..e69de29
diff --git a/lesson_1/task 3.py b/lesson_1/task 3.py
new file mode 100644
index 0000000..e8fff22
--- /dev/null
+++ b/lesson_1/task 3.py	
@@ -0,0 +1,6 @@
+x = input().split()
+elems = []
+for i in x:
+    i = float(i)
+    elems.append(abs(int(i)))
+print(elems)
\ No newline at end of file
diff --git a/lesson_1/task1.py b/lesson_1/task1.py
new file mode 100644
index 0000000..6fcbfb7
--- /dev/null
+++ b/lesson_1/task1.py
@@ -0,0 +1,5 @@
+strka = input()
+elems = []
+for i in strka:
+    elems.append(int(i))
+print(sum(elems))
\ No newline at end of file
diff --git a/lesson_1/task2.py b/lesson_1/task2.py
new file mode 100644
index 0000000..77c683a
--- /dev/null
+++ b/lesson_1/task2.py
@@ -0,0 +1,8 @@
+message = input()
+while True:
+  A = list(input().split('->'))
+  if len(A) == 0:
+   break
+  else:
+      message = message.replace(A[0], A[1])
+print(message)
\ No newline at end of file
diff --git a/lesson_1/task4.py b/lesson_1/task4.py
new file mode 100644
index 0000000..bfd682d
--- /dev/null
+++ b/lesson_1/task4.py
@@ -0,0 +1,2 @@
+input = input().split()
+print(sum(float(n) ** 2 for n in input))
\ No newline at end of file
diff --git a/lesson_1/task5.py b/lesson_1/task5.py
new file mode 100644
index 0000000..e69de29