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add: 220216 [Optimise]

This commit is contained in:
Lam Haoyin 2022-02-17 00:38:10 +08:00
parent 1da6f68efb
commit 568f4acca8
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GPG Key ID: 8C089CB1A2B7544F
1 changed files with 3 additions and 5 deletions
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8
2202/220216.cpp
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@ -34,16 +34,14 @@ public:
break; break;
// ptr --> ptrN --> ptrNN --> ptrNNN // ptr --> ptrN --> ptrNN --> ptrNNN
ListNode* ptrNNN = ptrNN->next; // ListNode* ptrNNN = ptrNN->next;
// ptr is previous node // ptr is previous node
// swap ptrN and ptrNN. // swap ptrN and ptrNN.
ptrNN->next = ptrN; (ptr = ((ptr->next = ptrNN)->next = ptrN))->next = ptrNN->next;
ptr->next = ptrNN;
ptrN->next = ptrNNN;
// ptr --> ptrNN --> ptrN --> ptrNNN // ptr --> ptrNN --> ptrN --> ptrNNN
ptr = ptrN; // ptr = ptrN;
} }
return ret.next; return ret.next;
} }