LeetCode 3203: Find Minimum Diameter After Merging Two Trees Solution

Master LeetCode problem 3203 (Find Minimum Diameter After Merging Two Trees), a hard challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.

3203. Find Minimum Diameter After Merging Two Trees

Hard

Tree Depth-First Search Breadth-First Search Graph

Problem Explanation

Explanation

To find the minimum diameter after merging two trees, we need to connect one node from the first tree to another node from the second tree. The diameter of a tree is the length of the longest path between any two nodes in the tree.

We can solve this problem by first finding the diameter of each individual tree, then considering all possible connections between the two trees. The minimum possible diameter of the resulting tree is the minimum of the following:

Maximum diameter of the first tree
Maximum diameter of the second tree
Longest path between a node from the first tree and a node from the second tree

We can find the diameter of a tree using Depth First Search (DFS) to find the farthest node from a starting node, and then running DFS again from this farthest node to find the actual diameter.

Solution Code

class Solution {
    public int minMergingDiameter(int[][] edges1, int[][] edges2) {
        // Implement the solution here
    }
}

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