🔢 Day 1

Author: AkashRajpurohit

README.md

@@ -5,7 +5,7 @@
 [Challenge Link](https://leetcode.com/explore/challenge/card/november-leetcoding-challenge/)
 
 ## Week 1 🚧
-Coming soon...
+1. [Convert Binary Number in a Linked List to Integer](https://leetcode.com/explore/challenge/card/november-leetcoding-challenge/564/week-1-november-1st-november-7th/3516/) ➡️ [CPP Solution](Week1/getDecimalValue.cpp)
 
 ## Week 2 🚧
 Coming soon...

Week1/getDecimalValue.cpp

@@ -0,0 +1,34 @@
+/**
+ * Definition for singly-linked list.
+ * struct ListNode {
+ *     int val;
+ *     ListNode *next;
+ *     ListNode() : val(0), next(nullptr) {}
+ *     ListNode(int x) : val(x), next(nullptr) {}
+ *     ListNode(int x, ListNode *next) : val(x), next(next) {}
+ * };
+ */
+class Solution {
+public:
+    int getDecimalValue(ListNode* head) {
+        if(head == NULL) return 0;
+        int len = 0;
+        ListNode* curr = head;
+        
+        while(curr != NULL) {
+            curr = curr->next;
+            len++;
+        }
+        
+        curr = head;
+        int num = 0;
+        
+        while(curr != NULL) {
+            num += curr->val * pow(2, len - 1);
+            curr = curr->next;
+            len--;
+        }
+        
+        return num;
+    }
+};