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Leetcode124.cpp
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69 lines (57 loc) · 2.12 KB
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// Leetcode124.cpp : This file contains the 'main' function. Program execution begins and ends there.
//
#include <iostream>
int maxPathSum(TreeNode* root) {
int maxSum = INT_MIN;
int final = maxPathSum(root, maxSum);
return max(maxSum, final);
}
int maxPathSum(TreeNode* root, int& maxSum) {
if (!root) return 0;
int left = maxPathSum(root->left, maxSum);
int right = maxPathSum(root->right, maxSum);
if (left < 0 && right < 0) {
maxSum = max(maxSum, root->val);
return root->val;
}
else {
maxSum = max(maxSum, left + right + root->val);
maxSum = max(maxSum, left + root->val);
maxSum = max(maxSum, right + root->val);
return left > right ? left + root->val : right + root->val;
}
}
//*************************************************
int maxPathSum(TreeNode* root) {
int maxSum = INT_MIN;
int final = maxPathSum(root, maxSum);
return max(maxSum, final);
}
int maxPathSum(TreeNode* root, int& maxSum) {
if (!root) return 0;
int left = maxPathSum(root->left, maxSum);
int right = maxPathSum(root->right, maxSum);
if (left < 0 && right < 0) {
maxSum = max(maxSum, root->val);
return root->val;
}
else {
maxSum = max(maxSum, left + right + root->val);
maxSum = max(maxSum, left + root->val);
maxSum = max(maxSum, right + root->val);
return left > right ? left + root->val : right + root->val;
}
}
int main()
{
std::cout << "Hello World!\n";
}
// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu
// Tips for Getting Started:
// 1. Use the Solution Explorer window to add/manage files
// 2. Use the Team Explorer window to connect to source control
// 3. Use the Output window to see build output and other messages
// 4. Use the Error List window to view errors
// 5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
// 6. In the future, to open this project again, go to File > Open > Project and select the .sln file