From 138d872a73449fdd4c63f7291fed23752eb7eda1 Mon Sep 17 00:00:00 2001
From: Anusha Kulkarni <88369729+hi-anusha@users.noreply.github.com>
Date: Fri, 7 Oct 2022 11:03:53 +0530
Subject: [PATCH] this commit fixes #136

Added c++ solution
---
 24- swap nodes in pairs.cpp | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 24- swap nodes in pairs.cpp

diff --git a/24- swap nodes in pairs.cpp b/24- swap nodes in pairs.cpp
new file mode 100644
index 0000000..7921696
--- /dev/null
+++ b/24- swap nodes in pairs.cpp	
@@ -0,0 +1,28 @@
+class Solution {
+public:
+    ListNode* swapPairs(ListNode* head) {
+       if (head == nullptr ||
+            head->next == nullptr) {
+            return head;
+        }
+        
+        ListNode * prev = nullptr;
+        ListNode * curr = head;
+        ListNode * nxt  = head->next;
+        
+        head = head->next;
+        
+        while (curr && nxt) {
+            if (prev)
+                prev->next = nxt;
+            curr->next = nxt->next;
+            nxt->next = curr;
+            prev = curr;
+            curr = curr->next;
+            if (curr)
+                nxt = curr->next;
+        }
+        
+        return head; 
+    }
+};
\ No newline at end of file