题解 | #两个链表的第一个公共结点#
两个链表的第一个公共结点
https://www.nowcoder.com/practice/6ab1d9a29e88450685099d45c9e31e46
/*function ListNode(x){ this.val = x; this.next = null; }*/ function FindFirstCommonNode(pHead1, pHead2) { // write code here if (pHead1 === null || pHead2 === null) return null let current1 = pHead1 let current2 = pHead2 if (current1 === current2) return current1 let hasCheckP1 = false let hasCheckP2 = false while (current1 !== current2) { if (current1.next) { current1 = current1.next } else { if (hasCheckP2) return null current1 = pHead2 hasCheckP2 = true } if (current2.next) { current2 = current2.next } else { if (hasCheckP1) return null current2 = pHead1 hasCheckP1 = true } } return current1 } module.exports = { FindFirstCommonNode : FindFirstCommonNode };