LeetCode 2374: Node With Highest Edge Score Solution

Master LeetCode problem 2374 (Node With Highest Edge Score), a medium 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.

2374. Node With Highest Edge Score

Medium

Hash Table Graph

Problem Explanation

Explanation

To solve this problem, we need to calculate the edge score of each node in the graph. We can do this by iterating through the given edges array and keeping track of the incoming edges for each node. Then, we find the node with the highest edge score and return it. If there are multiple nodes with the same highest edge score, we return the one with the smallest index.

Here are the steps to solve the problem:

Initialize an array incomingEdges to store the incoming edges for each node.
Iterate through the edges array and update the incomingEdges array accordingly.
Iterate through the incomingEdges array to calculate the edge score for each node.
Find the node with the highest edge score and return its index.

Time Complexity

The time complexity of this solution is O(n) where n is the number of nodes in the graph.

Space Complexity

The space complexity is also O(n) to store the incomingEdges array.

Solution Code

class Solution {
    public int findTheNodeWithHighestEdgeScore(int[] edges) {
        int n = edges.length;
        int[] incomingEdges = new int[n];
        
        for (int i = 0; i < n; i++) {
            if (edges[i] != i) {
                incomingEdges[edges[i]] += i;
            }
        }
        
        int maxNode = 0;
        int maxEdgeScore = 0;
        for (int i = 0; i < n; i++) {
            if (incomingEdges[i] > maxEdgeScore || (incomingEdges[i] == maxEdgeScore && i < maxNode)) {
                maxNode = i;
                maxEdgeScore = incomingEdges[i];
            }
        }
        
        return maxNode;
    }
}

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