diff --git a/triplet_problem/solution.c b/triplet_problem/solution.c
index 69ac10c..e412879 100644
--- a/triplet_problem/solution.c
+++ b/triplet_problem/solution.c
@@ -23,22 +23,76 @@ void findtriplet(int a[],int n)
  printf("No such triplet exists\n");
 }
 
-void sort(int a[],int n)
-{
- for(int i=0;i<n-1;i++)
- {
-   for(int j=0;j<=n-1-i;j++)
-   {
-     if(a[j] > a[j+1])
-     { 
-      int t;
-      t = a[j];
-      a[j] = a[j+1];
-      a[j+1] = t;
-     }
-   }
- }
-}
+void merge(int arr[], int l, int m, int r) 
+{ 
+    int i, j, k; 
+    int n1 = m - l + 1; 
+    int n2 =  r - m; 
+  
+    /* create temp arrays */
+    int L[n1], R[n2]; 
+  
+    /* Copy data to temp arrays L[] and R[] */
+    for (i = 0; i < n1; i++) 
+        L[i] = arr[l + i]; 
+    for (j = 0; j < n2; j++) 
+        R[j] = arr[m + 1+ j]; 
+  
+    /* Merge the temp arrays back into arr[l..r]*/
+    i = 0; // Initial index of first subarray 
+    j = 0; // Initial index of second subarray 
+    k = l; // Initial index of merged subarray 
+    while (i < n1 && j < n2) 
+    { 
+        if (L[i] <= R[j]) 
+        { 
+            arr[k] = L[i]; 
+            i++; 
+        } 
+        else
+        { 
+            arr[k] = R[j]; 
+            j++; 
+        } 
+        k++; 
+    } 
+  
+    /* Copy the remaining elements of L[], if there 
+       are any */
+    while (i < n1) 
+    { 
+        arr[k] = L[i]; 
+        i++; 
+        k++; 
+    } 
+  
+    /* Copy the remaining elements of R[], if there 
+       are any */
+    while (j < n2) 
+    { 
+        arr[k] = R[j]; 
+        j++; 
+        k++; 
+    } 
+} 
+  
+/* l is for left index and r is right index of the 
+   sub-array of arr to be sorted */
+void mergeSort(int arr[], int l, int r) 
+{ 
+    if (l < r) 
+    { 
+        // Same as (l+r)/2, but avoids overflow for 
+        // large l and h 
+        int m = l+(r-l)/2; 
+  
+        // Sort first and second halves 
+        mergeSort(arr, l, m); 
+        mergeSort(arr, m+1, r); 
+  
+        merge(arr, l, m, r); 
+    } 
+} 
 
 int main()
 {