diff --git a/5.py b/5.py
new file mode 100644
index 0000000..349ed2e
--- /dev/null
+++ b/5.py
@@ -0,0 +1,28 @@
+from random import randint
+
+a = [randint(0, 100) for i in range(10)]
+print(a)
+
+
+def fast(A, nac, kon):
+    if nac >= kon: return
+
+    nac1, kon1 = nac, kon
+    sr = A[(nac1 + kon1) // 2]
+    sr1 = int(str(sr)[0])
+    while nac1 <= kon1:
+        while int(str(A[nac1])[0]) < sr1:
+            nac1 += 1
+        while int(str(A[kon1])[0]) > sr1:
+            kon1 -= 1
+        if nac1 <= kon1:
+            A[nac1], A[kon1] = A[kon1], A[nac1]
+            nac1 += 1
+            kon1 -= 1
+        fast(A, nac, kon1)
+        fast(A, nac1, kon)
+
+
+fast(a, 0, len(a) - 1)
+print('Отсортированный массив: ')
+print(a)
\ No newline at end of file