/*function ListNode(x){ this.val = x; this.next = null; }*/ function FindFirstCommonNode(pHead1, pHead2) { let stack1 = [], stack2 = []; while (pHead1) { stack1.push(pHead1); pHead1 = pHead1.next; } while (pHead2) { stack2.push(pHead2); pHead2 = pHead2.next; } let len=Math.min(stack1.length,stack2.l...