Added running time of algorithm and update readme.md file

algorithms/C/README.md

@@ -7,6 +7,7 @@
 - [Reverse an array](arrays/reverse-array.c)
 - [Maximum difference](arrays/maximum-difference.c)
 - [Largest Element](arrays/largestElement.c)
+- [Second Largest Element](arrays/secondLargestElement.c)
 - [Sieve of Eratosthenes](arrays/sieve-of-eratosthenes.c)
 
 ## Bit Manipulation

algorithms/C/arrays/secondLargestElement.c

@@ -28,3 +28,11 @@ int main()
     second(arr,size);
     return 0;
 }
+
+/*
+----------------Sample Output----------------
+> 88 45
+
+Time Compexity: O(n)
+Space compexity: O(1)
+*/