Created
August 16, 2019 09:10
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"Add Two Numbers" leetcode coding interview problem & solution
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function ListNode(val) { | |
this.val = val; | |
this.next = null; | |
} | |
/** | |
* @param {ListNode} l1 | |
* @param {ListNode} l2 | |
* @return {ListNode} | |
*/ | |
var addTwoNumbers = function(l1, l2) { | |
let carry = 0; | |
let returnNode = null; | |
let lastNode = null; | |
while (l1 || l2 || carry > 0) { | |
let sum = carry; | |
if(l1) { | |
sum = sum + l1.val; | |
l1 = l1.next; | |
} | |
if(l2) { | |
sum = sum + l2.val; | |
l2 = l2.next; | |
} | |
let temp = new ListNode(sum % 10) | |
carry = Math.floor(sum / 10) | |
if (lastNode == null) { | |
lastNode = temp; | |
returnNode = lastNode; | |
} else { | |
lastNode.next = temp; | |
lastNode = lastNode.next; | |
} | |
} | |
return returnNode; | |
}; | |
let l1 = new ListNode(2); | |
let l11 = new ListNode(4); | |
l1.next = l11; | |
let l2 = new ListNode(5); | |
let l21 = new ListNode(6); | |
l2.next = l21; | |
let l22 = new ListNode(4); | |
l21.next = l22; | |
let result = addTwoNumbers(l1, l2); | |
while (result) { | |
console.log(result.val); | |
result = result.next; | |
} |
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