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2_AddTwoNumbers.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
2. Add Two Numbers
You are given two linked lists representing two non-negative numbers. The digits are
stored in reverse order and each of their nodes contain a single digit. Add the two
numbers and return it as a linked list.
Input: (2 -> 4 -> 3) + (5 -> 6 -> 4)
Output: 7 -> 0 -> 8
"""
# =====================================================================================
# Definition for singly-linked list.
# class ListNode(object):
# def __init__(self, x):
# self.val = x
# self.next = None
def stringToListNode(input):
# Generate list from the input
numbers = json.loads(input)
# Now convert that list into linked list
dummyRoot = ListNode(0)
ptr = dummyRoot
for number in numbers:
ptr.next = ListNode(number)
ptr = ptr.next
ptr = dummyRoot.next
return ptr
def prettyPrintLinkedList(node):
import sys
while node and node.next:
sys.stdout.write(str(node.val) + "->")
node = node.next
if node:
print(node.val)
else:
print("Empty LinkedList")
def main():
import sys
def readlines():
for line in sys.stdin:
yield line.strip('\n')
lines = readlines()
while True:
try:
line = lines.next()
node = stringToListNode(line)
prettyPrintLinkedList(node)
except StopIteration:
break
if __name__ == '__main__':
main()