diff --git a/lab5/Petrov/lab5.py b/lab5/Petrov/lab5.py
new file mode 100644
index 0000000..77e5dcd
--- /dev/null
+++ b/lab5/Petrov/lab5.py
@@ -0,0 +1,31 @@
+from random import *
+from sys import stdin
+a = list(map(int, stdin.readline().split()))
+ 
+def partition(l, r):
+    x = a[randint(l, r)]
+    i = l
+    j = r
+    while 1:
+        while a[i] < x:
+            i += 1
+        while a[j] > x:
+            j -= 1
+        if i < j:
+            a[i], a[j] = a[j], a[i]
+            i += 1
+            j -= 1
+        else:
+            return j
+           
+def quickSort(l, r):
+    if l < r:
+        q = partition(l, r)
+        quickSort(l, q)
+        quickSort(q + 1, r)
+    return a
+   
+b = quickSort(0, len(a) - 1)
+ 
+for i in range(len(b)):
+    print(b[i], end = ' ')