File: root - text - article - 2019 - 11 - Remove-Consecutive-Nodes-that-Sum-to-0.txt
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Tags: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | English | Home Page | Category: Computing | 220 Views, 20656 Search Bots | 146 Words
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Hi, here's your problem today. This problem was recently asked by Uber:
Given a linked list of integers, remove all consecutive nodes that sum up to 0.
Example:
Input: 10 -> 5 -> -3 -> -3 -> 1 -> 4 -> -4
Output: 10
The consecutive nodes 5 -> -3 -> -3 -> 1 sums up to 0 so that sequence should be removed. 4 -> -4 also sums up to 0 too so that sequence should also be removed.
Here's a starting point:
Tags: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | English | Home Page | Cateogry: Computing | 220 Views, 20656 Search Bots | 146 Words Given a linked list of integers, remove all consecutive nodes that sum up to 0.
Example:
Input: 10 -> 5 -> -3 -> -3 -> 1 -> 4 -> -4
Output: 10
The consecutive nodes 5 -> -3 -> -3 -> 1 sums up to 0 so that sequence should be removed. 4 -> -4 also sums up to 0 too so that sequence should also be removed.
Here's a starting point:
class Node:
def __init__(self, value, next=None):
self.value = value
self.next = next
def removeConsecutiveSumTo0(node):
# Fill this in.
node = Node(10)
node.next = Node(5)
node.next.next = Node(-3)
node.next.next.next = Node(-3)
node.next.next.next.next = Node(1)
node.next.next.next.next.next = Node(4)
node.next.next.next.next.next.next = Node(-4)
node = removeConsecutiveSumTo0(node)
while node:
print node.value,
node = node.next
# 10
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