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Create 1305.cpp
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leetcode/cpp/Tree/1305.cpp

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class Solution {
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public:
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vector<int> v;
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void tree1(TreeNode *root)
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{
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if(root!=NULL)
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{
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v.push_back(root->val);
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tree1(root->left);
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tree1(root->right);
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}
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}
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void tree2(TreeNode *root)
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{
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if(root!=NULL)
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{
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v.push_back(root->val);
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tree2(root->left);
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tree2(root->right);
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}
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}
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vector<int> getAllElements(TreeNode* root1, TreeNode* root2) {
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tree1(root1);
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tree2(root2);
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sort(v.begin(),v.end());
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return v;
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}
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};

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