Method sort

MergeSort.java:51–64

(int arr[], int l, int r)

	// Main function that sorts arr[l..r] using
	// merge()
	void sort(int arr[], int l, int r)
	{
		if (l < r) {
			// Find the middle point
			int m =l+ (r-l)/2;

			// Sort first and second halves
			sort(arr, l, m);
			sort(arr, m + 1, r);

			// Merge the sorted halves
			merge(arr, l, m, r);
		}
	}

	/* A utility function to print array of size n */
	static void printArray(int arr[])