Fibonacci_xor problem added

Author: riyavaryani

fibonacci_xor.cpp

@@ -0,0 +1,21 @@
+//Fibonacci XOR
+/*You are given three integers a, b, and n, calculate f(n), where f(n) is the xor of last two numbers
+i.e, f(n) = f(n-1)?f(n-2), where ? is xor operation.
+*/
+
+
+#include<bits/stdc++.h>
+using namespace std;
+int main()
+{
+  int a,b,n;
+    
+    cin>>a>>b>>n;
+    int rem=n%3;
+    if(rem==0) cout<<a<<endl;
+    else if(rem==1) cout<<b<<endl;
+    else cout<<(a^b)<<endl;
+  
+  return 0;
+}
+