Added solution to find-missing-element in C.

Author: saurabhjn76

solutions/c/find-missing-element.c

@@ -0,0 +1,20 @@
+#include <stdio.h>
+#include <stdlib.h>
+// The differnce in sum of two arrays will give us the  desired value.
+// The other approach could be to look up for element each time but that will increase the time complexity of the program.
+ int find_missing(int orig[],int On,int shuffled[])
+{
+	int i,sum=0;
+	for(i=0;i<On-1;i++)
+		sum+=orig[i]-shuffled[i];
+	return sum+orig[On-1];
+}
+
+int main()
+{
+	int arr[]={1,3,5,6,2,5,6,8,9,23,45,67,87};
+	int shuffled_arr[]={1,2,5,6,8,9,3,45,87,6,67,5};
+	int On=sizeof(arr) / sizeof(arr[1]);
+	printf("The missing value is:%d\n",find_missing(arr,On,shuffled_arr));
+	return 0;
+}