diff --git a/LabPSA_3/counting.py b/LabPSA_3/counting.py
index 8b13789..5862e1d 100644
--- a/LabPSA_3/counting.py
+++ b/LabPSA_3/counting.py
@@ -1 +1,20 @@
 
+import random
+
+places = [i for i in range(0, 100)]
+last, n = 0, 10000
+
+for i in range(n):
+    random.shuffle(places)
+    occupied = [random.randint(0, 99)]
+    for j in range(1, 100):
+        last = last + 1 if j == 99 and places[j] not in occupied else last
+        if places[j] in occupied:
+            x = random.choice(places)
+            while x in occupied:
+                x = random.choice(places)
+            occupied.append(x)
+        else:
+            occupied.append(places[j])
+
+print(last/n)