Merge pull request #102 from AkashSingh19/master

Added CPP code of swap nodes in pairs

Author: PawanJaiswal08

24.swap nodes in pairs.cpp

@@ -0,0 +1,12 @@
+class Solution {
+public:
+    ListNode* swapPairs(ListNode* head) {
+        if(!head || !head->next) return head;
+        ListNode* temp;
+        temp = head->next;
+        head->next = swapPairs(head->next->next);
+        temp->next = head;
+        
+        return temp;
+    }
+};