Created
March 29, 2024 15:07
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Leetcode 2: Add two numbers linkedlist
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Leetcode 2: Add two numbers linkedlist | |
# Definition for singly-linked list. | |
# class ListNode | |
# attr_accessor :val, :next | |
# def initialize(val = 0, _next = nil) | |
# @val = val | |
# @next = _next | |
# end | |
# end | |
# @param {ListNode} l1 | |
# @param {ListNode} l2 | |
# @return {ListNode} | |
def add_two_numbers(l1, l2) | |
carry = 0 | |
curr_list = ListNode.new | |
return_list = curr_list | |
while (l1!=nil && l2!=nil) do | |
t_sum = l1.val + l2.val + carry | |
if t_sum > 9 | |
curr_list.val = t_sum%10 | |
carry = 1 | |
else | |
curr_list.val = t_sum | |
carry = 0 | |
end | |
l1=l1.next | |
l2=l2.next | |
if l1 || l2 | |
curr_list.next = ListNode.new | |
curr_list = curr_list.next | |
end | |
end | |
while (l1!=nil) do | |
t_sum = l1.val + carry | |
if t_sum > 9 | |
curr_list.val = t_sum%10 | |
carry = 1 | |
else | |
curr_list.val = t_sum | |
carry = 0 | |
end | |
if l1=l1.next | |
curr_list.next = ListNode.new | |
curr_list = curr_list.next | |
end | |
end | |
while (l2!=nil) do | |
t_sum = l2.val + carry | |
if t_sum > 9 | |
curr_list.val = t_sum%10 | |
carry = 1 | |
else | |
curr_list.val = t_sum | |
carry = 0 | |
end | |
if l2=l2.next | |
curr_list.next = ListNode.new | |
curr_list = curr_list.next | |
end | |
end | |
if carry == 1 | |
curr_list.next = ListNode.new | |
curr_list = curr_list.next | |
curr_list.val = 1 | |
end | |
return return_list | |
# (0..[l1.count, l2.count].max).each do |i| | |
# if l1[i] && l2[i] | |
# t_sum = l1[i] + l2[i] + carry | |
# if t_sum > 9 | |
# out_arr << t_sum%10 | |
# carry = 1 | |
# else | |
# out_arr << t_sum | |
# carry = 0 | |
# end | |
# elsif l1[i] | |
# t_sum = l1[i] + carry | |
# if t_sum > 9 | |
# out_arr << t_sum%10 | |
# carry = 1 | |
# else | |
# out_arr << t_sum | |
# carry = 0 | |
# end | |
# elsif l2[i] | |
# t_sum = l2[i] + carry | |
# if t_sum > 9 | |
# out_arr << t_sum%10 | |
# carry = 1 | |
# else | |
# out_arr << t_sum | |
# carry = 0 | |
# end | |
# end | |
# end | |
#carry == 1 ? (out_arr << carry) : out_arr | |
end |
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