initial commit

Prog_2A/lab_8/mrg_sort.py

@@ -0,0 +1,42 @@
+import random
+import time
+
+
+def merge_sort(arr: list[int]) -> list[int]:
+    if len(arr) <= 1:
+        return arr
+
+    mid = len(arr) // 2
+    left_half = arr[:mid]
+    right_half = arr[mid:]
+
+    left_half = merge_sort(left_half)
+    right_half = merge_sort(right_half)
+
+    return merge(left_half, right_half)
+
+def merge(left: list[int], right: list[int], merged=None) -> list[int]:
+    if merged is None:
+        merged = []
+    l_index = 0
+    r_index = 0
+
+    while l_index < len(left) and r_index < len(right):
+        if left[l_index] <= right[r_index]:
+            merged.append(left[l_index])
+            l_index += 1
+        else:
+            merged.append(right[r_index])
+            r_index += 1
+
+    merged += left[l_index:]
+    merged += right[r_index:]
+    return merged
+
+NUM_ELEMENTS = 1_000_000
+l = [random.randint(0, 2*NUM_ELEMENTS) for _ in range(NUM_ELEMENTS)]
+
+start = time.time()
+print(merge_sort(l))
+end = time.time()
+print(f"time elapsed: {end - start} sec")

Prog_2A/lab_8/test.py

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+import random
+import time
+
+NUM_ELEMENTS = 1_000_000
+l = [random.randint(0, 2*NUM_ELEMENTS) for _ in range(NUM_ELEMENTS)]
+
+start = time.time()
+sorted(l)
+end = time.time()
+print(end - start)