18 lines
344 B
C++
18 lines
344 B
C++
#ifndef S0024_SWAP_NODES_IN_PAIRS_HPP
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#define S0024_SWAP_NODES_IN_PAIRS_HPP
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struct ListNode {
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int val;
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ListNode* next;
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ListNode() : val(0), next(nullptr) {}
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ListNode(int x) : val(x), next(nullptr) {}
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ListNode(int x, ListNode* next) : val(x), next(next) {}
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};
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class S0024 {
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public:
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ListNode* swapPairs(ListNode* head);
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};
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#endif
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