Create mergesort.md

sugandhkriti · web-flow · commit ab44380b9639 · 2020-10-19T15:57:32.000+05:30
Program of Merge Sort
diff --git a/mergesort.md b/mergesort.md
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+def mergeSort(myList):
+    if len(myList) > 1:
+        mid = len(myList) // 2
+        left = myList[:mid]
+        right = myList[mid:]
+
+        # Recursive call on each half
+        mergeSort(left)
+        mergeSort(right)
+
+        # Two iterators for traversing the two halves
+        i = 0
+        j = 0
+        
+        # Iterator for the main list
+        k = 0
+        
+        while i < len(left) and j < len(right):
+            if left[i] < right[j]:
+              # The value from the left half has been used
+              myList[k] = left[i]
+              # Move the iterator forward
+              i += 1
+            else:
+                myList[k] = right[j]
+                j += 1
+            # Move to the next slot
+            k += 1
+
+        # For all the remaining values
+        while i < len(left):
+            myList[k] = left[i]
+            i += 1
+            k += 1
+
+        while j < len(right):
+            myList[k]=right[j]
+            j += 1
+            k += 1
+
+myList = [54,26,93,17,77,31,44,55,20]
+mergeSort(myList)
+print(myList)
