Jul 14

Author: siddydutta

2025-07-July-LeetCoding-Challenge/Convert Binary Number in a Linked List to Integer.py

@@ -0,0 +1,27 @@
+# Definition for singly-linked list.
+class ListNode:
+    def __init__(self, val=0, next=None):
+        self.val = val
+        self.next = next
+
+
+class Solution:
+    def getDecimalValue(self, head: ListNode) -> int:
+        binary = 0
+        while head is not None:
+            binary *= 2
+            binary += head.val
+            head = head.next
+        return binary
+
+
+def main():
+    head = ListNode(1, ListNode(0, ListNode(1)))
+    assert Solution().getDecimalValue(head) == 5
+
+    head = ListNode(0)
+    assert Solution().getDecimalValue(head) == 0
+
+
+if __name__ == '__main__':
+    main()

2025-07-July-LeetCoding-Challenge/README.md

@@ -17,7 +17,7 @@
 | July 11 | [2402. Meeting Rooms III](https://leetcode.com/problems/meeting-rooms-iii/) | Hard | Unsolved |
 | July 12 | [1900. The Earliest and Latest Rounds Where Players Compete](https://leetcode.com/problems/the-earliest-and-latest-rounds-where-players-compete/) | Hard | Unsolved |
 | July 13 | [2410. Maximum Matching of Players With Trainers](https://leetcode.com/problems/maximum-matching-of-players-with-trainers/) | Medium | Solved |
-| July 14 | []() |  |  |
+| July 14 | [1290. Convert Binary Number in a Linked List to Integer](https://leetcode.com/problems/convert-binary-number-in-a-linked-list-to-integer/) | Easy | Solved |
 | July 15 | []() |  |  |
 | July 16 | []() |  |  |
 | July 17 | []() |  |  |
@@ -40,6 +40,6 @@
 ## Summary
 | Level  | Problems | Solved | Unsolved |
 | ---    | --- | --- | --- |
-| Easy   | 3 | 3 | 0 |
+| Easy   | 4 | 4 | 0 |
 | Medium | 5 | 5 | 0 |
 | Hard   | 5 | 1 | 4 |