Convert Binary Number in a Linked List to Integer
给一个linked list, 里面是0和1,二进制 求变成整数后的数.
/**
* Definition for singly-linked list.
* public class ListNode {
* int val;
* ListNode next;
* ListNode() {}
* ListNode(int val) { this.val = val; }
* ListNode(int val, ListNode next) { this.val = val; this.next = next; }
* }
*/
class Solution {
public int getDecimalValue(ListNode head) {
int res = 0;
while(head != null) {
res = (res << 1) | head.val;
head = head.next;
}
return res;
}
}