docs: add Merge Sort (#246)

docs/en/README.md

@@ -1,4 +1,6 @@
 # Algorithms
+## Sorting
+- [Merge Sort](./Sorting/Merge-Sort.md)
 
 ## Strings
 - [Palindrome](./Strings/Palindrome.md)

docs/en/Sorting/Merge-Sort.md

@@ -0,0 +1,25 @@
+# Merge Sort
+Merge Sort is a Divide and Conquer algorithm. It divides the input array into two halves, calls itself for the two halves, and then merges the two sorted halves.
+
+## Steps
+1. Find the middle point to divide the array into two halves.
+2. Call mergeSort for first half.
+3. Call mergeSort for second half.
+4. Merge the two halves sorted in step 2 and 3.
+
+## Example
+Given array is 
+**12 11 13 5 6 7** 
+
+Sorted array is 
+**5 6 7 11 12 13**
+
+## Implementation
+- [Java](../../../algorithms/Java/sorting/merge-sort.java)
+- [C](../../../algorithms/C/sorting/merge-sort.c)
+
+## Video URL
+[Youtube Video about Merge Sort](https://www.youtube.com/watch?v=jlHkDBEumP0) 
+
+## Others
+[Wikipedia](https://en.wikipedia.org/wiki/Merge_sort)