diff --git a/sum-of-xor-of-all-pairs.cpp b/sum-of-xor-of-all-pairs.cpp
new file mode 100644
index 00000000..4814c767
--- /dev/null
+++ b/sum-of-xor-of-all-pairs.cpp
@@ -0,0 +1,27 @@
+class Solution{
+    public:
+    // Returns sum of bitwise OR
+    // of all pairs
+    long long int sumXOR(int arr[], int n)
+    {
+    
+    	ll sum=0;
+    	for(int i=0;i<31;i++)
+    	{
+    	    ll one=0;
+    	    ll zero=0;
+    	
+    	    for(int j=0;j<n;j++)
+    	    {
+    	        if(arr[j]&(1<<i))
+    	        one++;
+    	        else
+    	        zero++;
+    	    }
+    	    
+    	    ll p=one*zero;
+    	    sum+=p*(1<<i);
+    	}
+    	return sum;
+    }
+};