diff --git a/GCD of n numbers.py b/GCD of n numbers.py
index 399a36e..ea41776 100644
--- a/GCD of n numbers.py	
+++ b/GCD of n numbers.py	
@@ -1,3 +1,33 @@
-from fractions import gcd
+'''edited by Shouvik Dutta
+'''
+#from fractions import gcd  //We get a deprecation warning // So import gcd from math
+from math import gcd
+import time   #to check the run time difference of in build function modules using and brute_force & Euclid method using 
+t1=time.time()
+from functools import reduce
 li=[12,16,48]
-print reduce(gcd,li)
+print (reduce(gcd,li))
+t2=time.time()
+print(t2-t1)
+
+
+t3=time.time()
+def my_gcd(a,b): 
+   while(b): 
+       a,b = b,a%b 
+   return a
+ans_gcd=li[0]
+for i in range(1,len(li)):
+    ans_gcd=my_gcd(ans_gcd,li[i])
+print(ans_gcd)
+t4=time.time()
+print(t4-t3)
+
+
+'''
+O/P==>
+4
+0.011922359466552734
+4
+0.005944013595581055
+'''