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- /**
- * Definition for singly-linked list.
- * struct ListNode {
- * int val;
- * ListNode *next;
- * ListNode() : val(0), next(nullptr) {}
- * ListNode(int x) : val(x), next(nullptr) {}
- * ListNode(int x, ListNode *next) : val(x), next(next) {}
- * };
- */
- class Solution {
- public:
- int getDecimalValue(ListNode* head) {
- int ans=head->val;
- while(head->next != nullptr){
- ans = ((ans<<1) | head->next->val);
- head = head->next;
- }
- return ans;
- }
- };
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