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Create 117.cpp

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Kirigaya Kazuto 2023-11-03 02:13:30 +08:00 committed by GitHub
parent 1be36799dd
commit 8fbe78e621
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1 changed files with 51 additions and 0 deletions
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class Solution {
public:
Node* processLevel(Node* leftMost) {
Node* nextLevelLeftMost = nullptr;
Node* nextLevelNext = nullptr;
for (Node* current = leftMost; current != nullptr; current = current->next) {
if (current->left && current->right) {
current->left->next = current->right;
if (!nextLevelLeftMost) {
nextLevelLeftMost = current->left;
nextLevelNext = current->right;
}
else {
nextLevelNext->next = current->left;
nextLevelNext = current->right;
}
}
else if (current->left) {
if (!nextLevelLeftMost) {
nextLevelLeftMost = current->left;
nextLevelNext = current->left;
}
else {
nextLevelNext->next = current->left;
nextLevelNext = current->left;
}
}
else if (current->right) {
if (!nextLevelLeftMost) {
nextLevelLeftMost = current->right;
nextLevelNext = current->right;
}
else {
nextLevelNext->next = current->right;
nextLevelNext = current->right;
}
}
}
return nextLevelLeftMost;
}
Node* connect(Node* root) {
Node* nextLevelEntry = root;
while (nextLevelEntry) {
nextLevelEntry = processLevel(nextLevelEntry);
}
return root;
}
};