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#include "leetcode.h"
class Solution {
public:
vvd levelOrder(Node *root) {
vvd ans;
if (!root)
return ans;
queue<Node *> q;
q.push(root);
while (!q.empty()) {
int n = q.size();
vector<int> v;
while (n--) {
auto curr = q.front();
q.pop();
v.push_back(curr->val);
for (auto it : curr->children)
q.push(it);
}
ans.push_back(v);
}
return ans;
}
};
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