Added TimSort

timsort.cpp

@@ -0,0 +1,131 @@
+
+#include<bits/stdc++.h>
+using namespace std;
+const int RUN = 32;
+
+
+void insertionSort(int arr[], int left, int right)
+{
+	for (int i = left + 1; i <= right; i++)
+	{
+		int temp = arr[i];
+		int j = i - 1;
+		while (j >= left && arr[j] > temp)
+		{
+			arr[j+1] = arr[j];
+			j--;
+		}
+		arr[j+1] = temp;
+	}
+}
+
+
+void merge(int arr[], int l, int m, int r)
+{
+
+	// Original array is broken in two parts
+	// left and right array
+	int len1 = m - l + 1, len2 = r - m;
+	int left[len1], right[len2];
+	for (int i = 0; i < len1; i++)
+		left[i] = arr[l + i];
+	for (int i = 0; i < len2; i++)
+		right[i] = arr[m + 1 + i];
+
+	int i = 0;
+	int j = 0;
+	int k = l;
+
+	// After comparing, we
+	// merge those two array
+	// in larger sub array
+	while (i < len1 && j < len2)
+	{
+		if (left[i] <= right[j])
+		{
+			arr[k] = left[i];
+			i++;
+		}
+		else
+		{
+			arr[k] = right[j];
+			j++;
+		}
+		k++;
+	}
+
+	// Copy remaining elements of left, if any
+	while (i < len1)
+	{
+		arr[k] = left[i];
+		k++;
+		i++;
+	}
+
+	// Copy remaining element of right, if any
+	while (j < len2)
+	{
+		arr[k] = right[j];
+		k++;
+		j++;
+	}
+}
+
+
+void timSort(int arr[], int n)
+{
+
+	for (int i = 0; i < n; i+=RUN)
+		insertionSort(arr, i, min((i+RUN-1),
+									(n-1)));
+
+
+	for (int size = RUN; size < n;
+							size = 2*size)
+	{
+
+
+		for (int left = 0; left < n;
+							left += 2*size)
+		{
+
+			// find ending point of
+			// left sub array
+			// mid+1 is starting point
+			// of right sub array
+			int mid = left + size - 1;
+			int right = min((left + 2*size - 1),
+											(n-1));
+
+			// merge sub array arr[left.....mid] &
+			// arr[mid+1....right]
+			if(mid < right)
+				merge(arr, left, mid, right);
+		}
+	}
+}
+
+
+void printArray(int arr[], int n)
+{
+	for (int i = 0; i < n; i++)
+		printf("%d ", arr[i]);
+	printf("\n");
+}
+
+
+int main()
+{
+	int arr[] = {-2, 7, 15, -14, 0, 15, 0, 7, -7,
+					-4, -13, 5, 8, -14, 12};
+	int n = sizeof(arr)/sizeof(arr[0]);
+	printf("Given Array is\n");
+	printArray(arr, n);
+
+	// Function Call
+	timSort(arr, n);
+
+	printf("After Sorting Array is\n");
+	printArray(arr, n);
+	return 0;
+}