From 4349ad85a06f47f84abbfbdb98427083ed5ca430 Mon Sep 17 00:00:00 2001 From: Jack Sangdahl Date: Sun, 13 Jul 2025 21:16:55 -0600 Subject: 1290. convert binary number in a linked list to integer --- convert_bin_ll_int.py | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 convert_bin_ll_int.py (limited to 'convert_bin_ll_int.py') diff --git a/convert_bin_ll_int.py b/convert_bin_ll_int.py new file mode 100644 index 0000000..316dd4b --- /dev/null +++ b/convert_bin_ll_int.py @@ -0,0 +1,36 @@ +# 1290. Convert Binary Number in a Linked List to Integer + +""" +given 'head' which is a reference node to a singly linked list. the value of +each node in the linked list is either 0 or 1. the linked list holds the +binary representation of a number. return the decimal value of the number in +the linked list. the most significant bit is at the head of the linked list. +""" + + +# Definition for singly-linked list. +class ListNode(object): + def __init__(self, val=0, next=None): + self.val = val + self.next = next + + +class Solution(object): + def getDecimalValue(self, head): + """ + :type head: Optional[ListNode] + :rtype: int + """ + ans = 0 + while head: + ans = 2 * ans + head.val + head = head.next + return ans + + +if __name__ == "__main__": + obj = Solution() + h1 = ListNode(1, ListNode(0, ListNode(1))) + h2 = ListNode(0) + print(obj.getDecimalValue(h1)) + print(obj.getDecimalValue(h2)) -- cgit v1.2.3