Merge pull request #284 from gargi16/master

changes in readme

README.md

@@ -385,6 +385,10 @@ Please note that this project is released with a [Code of Conduct](CODE_OF_CONDU
 
 # G
 
+### Gargi
+- I am an Undergraduate .
+- I like competitive programming. 
+
 ### Gerlis A.C  :computer: (@gerlis18)
 - I am from Colombia.
 - I am a junior developer Java, Javascript, HTML.

code/mergeSort.cpp

@@ -0,0 +1,60 @@
+#include<bits/stdc++.h>
+using namespace std ;
+
+void merge(int arr[], int l, int m , int r){
+	int n1 = m-l+1;
+	int n2 = r-m ;
+	int L[n1];
+	int R[n2];
+	for (int i = 0; i < n1; i++)
+        L[i] = arr[l + i];
+    for (int j = 0; j < n2; j++)
+        R[j] = arr[m + 1+ j];
+	int i =0, j= 0 , k=l ;
+	while(i<n1 && j<n2){
+		if(L[i]<R[j]){
+			arr[k]= L[i];
+			i++;
+		}
+		else{
+			arr[k]= R[j];
+			j++;
+		}
+		k++;
+	}
+	while(i<n1){
+		arr[k] = L[i];
+		i++;k++;
+	}
+	while(j<n2){
+		arr[k]= R[j];
+		j++;k++;
+	}
+	
+}
+void mergeSort(int arr[], int l, int r){
+	if(l<r){
+		int m = l+ (r-l)/2 ;
+		mergeSort(arr,l, m);
+		mergeSort(arr,m+1,r);
+		
+		merge(arr, l,m,r);
+	}
+}
+void printArray(int A[], int size)
+{
+    int i;
+    for (i=0; i < size; i++)
+        printf("%d ", A[i]);
+    printf("\n");
+}
+
+
+int main() {
+	int arr[]= {7,5,11,13,6,12};
+	printArray(arr,6);
+	mergeSort(arr,0,5);
+	printArray(arr, 6);
+	
+	return 0;	
+}